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.

A269188 Number of n X 2 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 16
2 108
3 708
4 4476
5 27684
6 168252
7 1008804
8 5983164
9 35170980
10 205214268
11 1189853604
12 6861684156
13 39384946596
14 225136169532
15 1282284719268
16 7279841963964
17 41210177357988
18 232678853273148
19 1310648830057380

List of values

[16, 108, 708, 4476, 27684, 168252, 1008804, 5983164, 35170980, 205214268, 1189853604, 6861684156, 39384946596, 225136169532, 1282284719268, 7279841963964, 41210177357988, 232678853273148, 1310648830057380]

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

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