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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.

A195003 Number of lower triangles of a 7 X 7 0..n array with each element differing from all of its horizontal and vertical neighbors by one.

Table of values

n a(n)
1 2
2 69632
3 641376
4 2059822
5 3816148
6 5740166
7 7686580
8 9643120
9 11600228
10 13557614
11 15515004
12 17472396
13 19429788
14 21387180
15 23344572
16 25301964
17 27259356
18 29216748
19 31174140
20 33131532
21 35088924
22 37046316
23 39003708
24 40961100
25 42918492

List of values

[2, 69632, 641376, 2059822, 3816148, 5740166, 7686580, 9643120, 11600228, 13557614, 15515004, 17472396, 19429788, 21387180, 23344572, 25301964, 27259356, 29216748, 31174140, 33131532, 35088924, 37046316, 39003708, 40961100, 42918492]

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

Content is available under The OEIS End-User License Agreement.