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.

A301611 Number of nX4 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

Table of values

n a(n)
1 2
2 34
3 367
4 3816
5 40085
6 421025
7 4422826
8 46459647
9 488047397
10 5126802206
11 53855652961
12 565739028561
13 5942934438842
14 62428910463417
15 655798724558441
16 6888987247456952
17 72366937453302201
18 760194996499019669

List of values

[2, 34, 367, 3816, 40085, 421025, 4422826, 46459647, 488047397, 5126802206, 53855652961, 565739028561, 5942934438842, 62428910463417, 655798724558441, 6888987247456952, 72366937453302201, 760194996499019669]

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

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