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.

A059476 Number of 4n X 4n quarter-turn symmetric alternating-sign matrices (QTSASM's).

Table of values

n a(n)
0 1
1 2
2 40
3 6860
4 9779616
5 114640611228
6 10995014015567296
7 8604220484134405095680
8 54849585336544518476372715520
9 2845241019832977820277705514596768000
10 1200139922362764777157943140382976769515000000

List of values

[1, 2, 40, 6860, 9779616, 114640611228, 10995014015567296, 8604220484134405095680, 54849585336544518476372715520, 2845241019832977820277705514596768000, 1200139922362764777157943140382976769515000000]

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

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