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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.

A263053 Number of (n+1) X 2 0..1 arrays with each row and column not divisible by 3, read as a binary number with top and left being the most significant bits.

Table of values

n a(n)
1 2
2 2
3 10
4 10
5 42
6 42
7 170
8 170
9 682
10 682
11 2730
12 2730
13 10922
14 10922
15 43690
16 43690
17 174762
18 174762
19 699050
20 699050
21 2796202
22 2796202
23 11184810
24 11184810
25 44739242
26 44739242
27 178956970
28 178956970
29 715827882
30 715827882
31 2863311530
32 2863311530

List of values

[2, 2, 10, 10, 42, 42, 170, 170, 682, 682, 2730, 2730, 10922, 10922, 43690, 43690, 174762, 174762, 699050, 699050, 2796202, 2796202, 11184810, 11184810, 44739242, 44739242, 178956970, 178956970, 715827882, 715827882, 2863311530, 2863311530]

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

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