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.

A303097 Number of n X 3 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 1
2 15
3 77
4 486
5 2869
6 17229
7 102952
8 616065
9 3685099
10 22045482
11 131879323
12 788928513
13 4719516650
14 28233043741
15 168895389127
16 1010364108842
17 6044188782411
18 36157478162593
19 216300858973502
20 1293952564919109

List of values

[1, 15, 77, 486, 2869, 17229, 102952, 616065, 3685099, 22045482, 131879323, 788928513, 4719516650, 28233043741, 168895389127, 1010364108842, 6044188782411, 36157478162593, 216300858973502, 1293952564919109]

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

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