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.

A302429 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 10
3 21
4 42
5 83
6 235
7 532
8 1250
9 2839
10 6972
11 16274
12 38248
13 89001
14 212049
15 499017
16 1173745
17 2751350
18 6500703
19 15315258
20 36048935
21 84729145
22 199692020
23 470383120
24 1107496019
25 2605813342
26 6136943366
27 14452575010
28 34030167171
29 80103073519

List of values

[8, 10, 21, 42, 83, 235, 532, 1250, 2839, 6972, 16274, 38248, 89001, 212049, 499017, 1173745, 2751350, 6500703, 15315258, 36048935, 84729145, 199692020, 470383120, 1107496019, 2605813342, 6136943366, 14452575010, 34030167171, 80103073519]

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

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