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.

A302637 Number of 4 X n 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 10
3 19
4 33
5 65
6 149
7 304
8 643
9 1343
10 2880
11 6038
12 12805
13 27015
14 57283
15 120917
16 255898
17 540904
18 1144495
19 2419416
20 5117330
21 10820901
22 22886110
23 48394996
24 102347752
25 216437366
26 457724270
27 967964774
28 2047035882
29 4328987213

List of values

[8, 10, 19, 33, 65, 149, 304, 643, 1343, 2880, 6038, 12805, 27015, 57283, 120917, 255898, 540904, 1144495, 2419416, 5117330, 10820901, 22886110, 48394996, 102347752, 216437366, 457724270, 967964774, 2047035882, 4328987213]

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

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