cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A001500 Number of stochastic matrices of integers: n X n arrays of nonnegative integers with all row and column sums equal to 3.

Table of values

n a(n)
0 1
1 1
2 4
3 55
4 2008
5 153040
6 20933840
7 4662857360
8 1579060246400
9 772200774683520
10 523853880779443200
11 477360556805016931200
12 569060910292172349004800
13 868071731152923490921728000
14 1663043727673392444887284377600
15 3937477620391471128913917360384000

List of values

[1, 1, 4, 55, 2008, 153040, 20933840, 4662857360, 1579060246400, 772200774683520, 523853880779443200, 477360556805016931200, 569060910292172349004800, 868071731152923490921728000, 1663043727673392444887284377600, 3937477620391471128913917360384000]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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