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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.

A263120 Number of (n+3)X(2+3) 0..1 arrays with each row divisible by 15 and column not divisible by 15, read as a binary number with top and left being the most significant bits.

Table of values

n a(n)
1 36
2 148
3 522
4 1708
5 5124
6 15640
7 47602
8 144236
9 432708
10 1295524
11 3883594
12 11649676
13 34949028
14 104703688
15 313818418
16 940969804
17 2822909412
18 8465899188
19 25390861962
20 76159749740
21 228479249220
22 685409187320
23 2056136698226

List of values

[36, 148, 522, 1708, 5124, 15640, 47602, 144236, 432708, 1295524, 3883594, 11649676, 34949028, 104703688, 313818418, 940969804, 2822909412, 8465899188, 25390861962, 76159749740, 228479249220, 685409187320, 2056136698226]

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

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