cp's OEIS Frontend

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.

A230187 Number of 4Xn 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 0
2 129
3 1971
4 73857
5 2432241
6 82359177
7 2770525761
8 93340154655
9 3143682463065
10 105885454704267
11 3566387657985771
12 120121801796361177
13 4045897974546191799
14 136272446957010253599
15 4589878342395006746985
16 154594591461184687863333

List of values

[0, 129, 1971, 73857, 2432241, 82359177, 2770525761, 93340154655, 3143682463065, 105885454704267, 3566387657985771, 120121801796361177, 4045897974546191799, 136272446957010253599, 4589878342395006746985, 154594591461184687863333]

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

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