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.

A187622 Number of (n+1)X(n+1) 0..2 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.

Table of values

n a(n)
1 31
2 446
3 60
4 324452
5 70548
6 6090023738
7 720252796

List of values

[31, 446, 60, 324452, 70548, 6090023738, 720252796]

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

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