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.

A269105 Number of nX4 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 216
2 15540
3 872460
4 43964700
5 2085484068
6 95166487524
7 4227147007836
8 184069947098892
9 7894012975085748
10 334480929126425748
11 14034341507370527532
12 584107408947764887164
13 24145251769444080595908

List of values

[216, 15540, 872460, 43964700, 2085484068, 95166487524, 4227147007836, 184069947098892, 7894012975085748, 334480929126425748, 14034341507370527532, 584107408947764887164, 24145251769444080595908]

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

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