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.

A187625 Number of 3X3 0..n 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 24
2 446
3 2924
4 12104
5 37448
6 98014
7 221640
8 457632
9 871712
10 1562702
11 2649632
12 4329136
13 6782660
14 10323450
15 15291860
16 22111560
17 31246860
18 43422938
19 59215112
20 79658992
21 105617736
22 138251814
23 178796912
24 229108212
25 290437464
26 364933542

List of values

[24, 446, 2924, 12104, 37448, 98014, 221640, 457632, 871712, 1562702, 2649632, 4329136, 6782660, 10323450, 15291860, 22111560, 31246860, 43422938, 59215112, 79658992, 105617736, 138251814, 178796912, 229108212, 290437464, 364933542]

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

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