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.

A302685 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 64
2 22
3 29
4 121
5 257
6 1125
7 6311
8 25139
9 96728
10 439233
11 1942666
12 8017639
13 34024545
14 148137877
15 632641084
16 2682460593
17 11495724321
18 49301780598
19 210361660516
20 898372105583
21 3844885757451
22 16440103793864
23 70240799575385

List of values

[64, 22, 29, 121, 257, 1125, 6311, 25139, 96728, 439233, 1942666, 8017639, 34024545, 148137877, 632641084, 2682460593, 11495724321, 49301780598, 210361660516, 898372105583, 3844885757451, 16440103793864, 70240799575385]

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

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