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.

A262314 Number of (n+2)X(2+2) 0..1 arrays with each row and column divisible by 7, read as a binary number with top and left being the most significant bits.

Table of values

n a(n)
1 3
2 5
3 9
4 27
5 61
6 145
7 435
8 1253
9 3593
10 10779
11 32445
12 96881
13 290643
14 875365
15 2627721
16 7883163
17 23685949
18 71096657
19 213289971
20 640160485
21 1920877321
22 5762631963
23 17289819325
24 51872540977
25 155617622931
26 466863471461
27 1400610395529

List of values

[3, 5, 9, 27, 61, 145, 435, 1253, 3593, 10779, 32445, 96881, 290643, 875365, 2627721, 7883163, 23685949, 71096657, 213289971, 640160485, 1920877321, 5762631963, 17289819325, 51872540977, 155617622931, 466863471461, 1400610395529]

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

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