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.

A301835 Number of n X n 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 1
2 8
3 139
4 5748
5 496085
6 97439921
7 41966406867
8 39919204098331
9 84196647385137200
10 391960289300558475785
11 4034683591387591205214712
12 91832712356420807374009031299
13 4618825005074327343319160956639454

List of values

[1, 8, 139, 5748, 496085, 97439921, 41966406867, 39919204098331, 84196647385137200, 391960289300558475785, 4034683591387591205214712, 91832712356420807374009031299, 4618825005074327343319160956639454]

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

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