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.

A284160 Number of n X 3 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Table of values

n a(n)
1 3
2 13
3 62
4 461
5 2872
6 21790
7 154108
8 1174235
9 8682209
10 66280564
11 500956582
12 3842195970
13 29399659661
14 226595079490
15 1747037865422
16 13523344571285
17 104799855374221
18 814166845363267
19 6333123661559589
20 49348005883512820

List of values

[3, 13, 62, 461, 2872, 21790, 154108, 1174235, 8682209, 66280564, 500956582, 3842195970, 29399659661, 226595079490, 1747037865422, 13523344571285, 104799855374221, 814166845363267, 6333123661559589, 49348005883512820]

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

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