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.

A202797 Number of n X 3 binary arrays with every one adjacent to another one horizontally or vertically.

Table of values

n a(n)
1 4
2 36
3 250
4 1718
5 11988
6 83518
7 581518
8 4049700
9 28202318
10 196400270
11 1367728548
12 9524845126
13 66330898142
14 461927514284
15 3216857242006
16 22402152254494
17 156008298702684
18 1086439775514766
19 7565952552767646
20 52689195775528564

List of values

[4, 36, 250, 1718, 11988, 83518, 581518, 4049700, 28202318, 196400270, 1367728548, 9524845126, 66330898142, 461927514284, 3216857242006, 22402152254494, 156008298702684, 1086439775514766, 7565952552767646, 52689195775528564]

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

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