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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.

A195525 Number of lower triangles of a 7X7 -n..n array with all row and column sums zero.

Table of values

n a(n)
1 505623
2 839301197
3 122092290831
4 5151383545261
5 103074513713971
6 1252997799222737
7 10665939121760907
8 69488770600802237
9 367679036207885407
10 1647079991451268941
11 6438544930173240123
12 22466897655527435065

List of values

[505623, 839301197, 122092290831, 5151383545261, 103074513713971, 1252997799222737, 10665939121760907, 69488770600802237, 367679036207885407, 1647079991451268941, 6438544930173240123, 22466897655527435065]

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

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