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.

A262415 Number of (n+1) X (3+1) 0..1 arrays with each row divisible by 3 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 6
2 45
3 270
4 1701
5 10206
6 61965
7 371790
8 2237301
9 13423806
10 80601885
11 483611310
12 2902199301
13 17413195806
14 104483957805
15 626903746830
16 3761465527701
17 22568793166206
18 135413146417725
19 812478878506350
20 4874876757822501

List of values

[6, 45, 270, 1701, 10206, 61965, 371790, 2237301, 13423806, 80601885, 483611310, 2902199301, 17413195806, 104483957805, 626903746830, 3761465527701, 22568793166206, 135413146417725, 812478878506350, 4874876757822501]

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

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