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.

A342990 Number of horizontally or vertically semicyclic diagonal Latin squares of order 2n+1.

Table of values

n a(n)
0 1
1 0
2 240
3 20160
4 0
5 319334400
6 2167003238400
7 0
8 2943669154922496000
9 5253122016055001088000
10 0
11 144827547726179682893168640000
12 1214667347283206181421056000000000
13 0
14 184737047979495031539522261089255424000000
15 3555700708206908663181998415125686517760000000
16 0

List of values

[1, 0, 240, 20160, 0, 319334400, 2167003238400, 0, 2943669154922496000, 5253122016055001088000, 0, 144827547726179682893168640000, 1214667347283206181421056000000000, 0, 184737047979495031539522261089255424000000, 3555700708206908663181998415125686517760000000, 0]

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

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