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.

A303310 Number of nX4 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 5
2 5
3 17
4 36
5 74
6 165
7 361
8 783
9 1710
10 3744
11 8176
12 17851
13 39009
14 85239
15 186206
16 406800
17 888794
18 1941803
19 4242301
20 9268393
21 20249240
22 44239542
23 96652372
24 211161719
25 461336399
26 1007905991
27 2202025876
28 4810883806
29 10510594448
30 22963055655

List of values

[5, 5, 17, 36, 74, 165, 361, 783, 1710, 3744, 8176, 17851, 39009, 85239, 186206, 406800, 888794, 1941803, 4242301, 9268393, 20249240, 44239542, 96652372, 211161719, 461336399, 1007905991, 2202025876, 4810883806, 10510594448, 22963055655]

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

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