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.

A187629 Number of (n+1)X(n+1) 0..1 arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.

Table of values

n a(n)
1 10
2 24
3 24
4 954
5 954
6 194008
7 194008
8 196196792
9 196196792
10 1031851558448
11 1031851558448
12 27419179198175312
13 27419179198175312

List of values

[10, 24, 24, 954, 954, 194008, 194008, 196196792, 196196792, 1031851558448, 1031851558448, 27419179198175312, 27419179198175312]

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

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