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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.

A230680 Number of 6Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 0
2 11925
3 3669765
4 1100265795
5 436827078531
6 169908632412447
7 65376252475286079
8 25197971211829585887
9 9715194049282171327617
10 3745393333629058405378449
11 1443910366341874206277548363

List of values

[0, 11925, 3669765, 1100265795, 436827078531, 169908632412447, 65376252475286079, 25197971211829585887, 9715194049282171327617, 3745393333629058405378449, 1443910366341874206277548363]

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

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