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.

A303470 Number of 3Xn 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 4
2 32
3 170
4 948
5 5237
6 29009
7 160590
8 888993
9 4921496
10 27244949
11 150826626
12 834967061
13 4622327859
14 25588933014
15 141658809728
16 784214751260
17 4341366231543
18 24033545332699
19 133048277989004
20 736547356196655

List of values

[4, 32, 170, 948, 5237, 29009, 160590, 888993, 4921496, 27244949, 150826626, 834967061, 4622327859, 25588933014, 141658809728, 784214751260, 4341366231543, 24033545332699, 133048277989004, 736547356196655]

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

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