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.

A303681 Number of nX7 0..1 arrays with every element unequal to 0, 1 or 3 king-move adjacent elements, with upper left element zero.

Table of values

n a(n)
1 21
2 103
3 57
4 90
5 150
6 245
7 367
8 509
9 697
10 957
11 1311
12 1851
13 2671
14 3869
15 5547
16 7907
17 11275
18 16101
19 22959
20 32717
21 46663
22 66633
23 95139
24 135763
25 193701
26 276435
27 394533
28 563013
29 803377
30 1146445
31 1636117
32 2334893
33 3331971
34 4754851
35 6785501
36 9683407

List of values

[21, 103, 57, 90, 150, 245, 367, 509, 697, 957, 1311, 1851, 2671, 3869, 5547, 7907, 11275, 16101, 22959, 32717, 46663, 66633, 95139, 135763, 193701, 276435, 394533, 563013, 803377, 1146445, 1636117, 2334893, 3331971, 4754851, 6785501, 9683407]

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

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