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.

A302524 Number of nX4 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 2
2 10
3 42
4 168
5 902
6 3256
7 15852
8 77904
9 314276
10 1506894
11 7035934
12 30537794
13 143024948
14 655833426
15 2937151450
16 13568476862
17 61920768478
18 280707441628
19 1287994621032
20 5873565899442
21 26746065104754
22 122342967545180

List of values

[2, 10, 42, 168, 902, 3256, 15852, 77904, 314276, 1506894, 7035934, 30537794, 143024948, 655833426, 2937151450, 13568476862, 61920768478, 280707441628, 1287994621032, 5873565899442, 26746065104754, 122342967545180]

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

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