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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.

A262413 Number of (n+1)X(n+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 2
2 4
3 270
4 18228
5 9401742
6 15231780324
7 114043973318270
8 3210825131209677780
9 376663000295700912108942
10 173793136176160952800090974444
11 324528460592527213101965898811701630

List of values

[2, 4, 270, 18228, 9401742, 15231780324, 114043973318270, 3210825131209677780, 376663000295700912108942, 173793136176160952800090974444, 324528460592527213101965898811701630]

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

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