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.

A302274 Number of n X 4 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 2
2 10
3 29
4 89
5 353
6 941
7 3316
8 12016
9 34060
10 120940
11 415304
12 1257949
13 4395268
14 14710881
15 46444038
16 159674287
17 528683443
18 1709740974
19 5804427370
20 19154720511
21 62771586925
22 211230338251
23 697032878924
24 2300170434527
25 7695594400341

List of values

[2, 10, 29, 89, 353, 941, 3316, 12016, 34060, 120940, 415304, 1257949, 4395268, 14710881, 46444038, 159674287, 528683443, 1709740974, 5804427370, 19154720511, 62771586925, 211230338251, 697032878924, 2300170434527, 7695594400341]

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

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