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.

A302261 Number of nX4 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 105
3 772
4 5922
5 45717
6 353229
7 2727755
8 21069318
9 162753849
10 1257225302
11 9711792270
12 75021745843
13 579529894725
14 4476770505137
15 34582309009590
16 267142643360807
17 2063633101348406
18 15941227812038514
19 123143376763267969

List of values

[8, 105, 772, 5922, 45717, 353229, 2727755, 21069318, 162753849, 1257225302, 9711792270, 75021745843, 579529894725, 4476770505137, 34582309009590, 267142643360807, 2063633101348406, 15941227812038514, 123143376763267969]

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

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