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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.

A230651 Number of nX7 0..2 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 0
2 63
3 231
4 11745
5 90393
6 3951657
7 31908483
8 1374288243
9 11150938215
10 479621050353
11 3893231603781
12 167435671598913
13 1359174652590399
14 58453268091967479
15 474501281118252903
16 20406595554618417837

List of values

[0, 63, 231, 11745, 90393, 3951657, 31908483, 1374288243, 11150938215, 479621050353, 3893231603781, 167435671598913, 1359174652590399, 58453268091967479, 474501281118252903, 20406595554618417837]

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

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