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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.

A201493 Number of nX5 zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing.

Table of values

n a(n)
1 12
2 7815
3 7798656
4 6697376240
5 4585552158911
6 2571822263246639
7 1219998885223727883
8 501770963443215883902
9 182271590618268117246577
10 59312881704712898493358018
11 17484065266324835514539288191

List of values

[12, 7815, 7798656, 6697376240, 4585552158911, 2571822263246639, 1219998885223727883, 501770963443215883902, 182271590618268117246577, 59312881704712898493358018, 17484065266324835514539288191]

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

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