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Pandigital number. In mathematics, a pandigital number is an integer that in a given base has among its significant digits each digit used in the base at least once. For example, 1234567890 (one billion two hundred thirty-four million five hundred sixty-seven thousand eight hundred ninety) is a pandigital number in base 10.
Polydivisible number. In mathematics a polydivisible number (or magic number) is a number in a given number base with digits abcde... that has the following properties: [ 1] Its first digit a is not 0. The number formed by its first two digits ab is a multiple of 2. The number formed by its first three digits abc is a multiple of 3.
1,069,863,695 = number of square (0,1)-matrices without zero rows and with exactly 9 entries equal to 1 ... 1,234,567,890 : pandigital number with the digits in order.
An abundant number whose abundance is greater than any lower number is called a highly abundant number, and one whose relative abundance (i.e. s(n)/n ) is greater than any lower number is called a superabundant number; Every integer greater than 20161 can be written as the sum of two abundant numbers. The largest even number that is not the sum ...
Stirling number. In mathematics, Stirling numbers arise in a variety of analytic and combinatorial problems. They are named after James Stirling, who introduced them in a purely algebraic setting in his book Methodus differentialis (1730). [ 1] They were rediscovered and given a combinatorial meaning by Masanobu Saka in 1782.
In computer storage, the standard RAID levels comprise a basic set of RAID ("redundant array of independent disks" or "redundant array of inexpensive disks") configurations that employ the techniques of striping, mirroring, or parity to create large reliable data stores from multiple general-purpose computer hard disk drives (HDDs).
Harry wants to create an article on the pandigital number 1023458967. The only property of the number that he knows about is that it's a pandigital number. 1023458967 is a pandigital number. Start with 10 7 points. Harry finds an entry on pandigital numbers in Eric W. Weisstein's CRC Concise Encyclopedia of Mathematics. He ignores the fact that ...
Fuss–Catalan number. In combinatorial mathematics and statistics, the Fuss–Catalan numbers are numbers of the form. They are named after N. I. Fuss and Eugène Charles Catalan . In some publications this equation is sometimes referred to as Two-parameter Fuss–Catalan numbers or Raney numbers. The implication is the single-parameter Fuss ...