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.

A181199 Number of 5 X n matrices containing a permutation of 1..5*n in increasing order rowwise, columnwise, diagonally and (downwards) antidiagonally.

Table of values

n a(n)
1 1
2 1
3 16
4 985
5 141696
6 36372976
7 14083834704
8 7372392431849
9 4848332563899256
10 3808369342900073856
11 3447336241467721584256
12 3503140094024746011745456
13 3918646197894288330216058576
14 4753102567048482059557067412816
15 6178133154985813161258658378449616

List of values

[1, 1, 16, 985, 141696, 36372976, 14083834704, 7372392431849, 4848332563899256, 3808369342900073856, 3447336241467721584256, 3503140094024746011745456, 3918646197894288330216058576, 4753102567048482059557067412816, 6178133154985813161258658378449616]

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

Content is available under The OEIS End-User License Agreement.