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.

A207398 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.

Table of values

n a(n)
1 2
2 16
3 102
4 729
5 4212
6 26896
7 154580
8 970225
9 5697150
10 36000000
11 216023850
12 1377968641
13 8411571224
14 54080432704
15 334469528520
16 2163643890489
17 13517662791690
18 87865126849600
19 553380551724110
20 3610810383420361

List of values

[2, 16, 102, 729, 4212, 26896, 154580, 970225, 5697150, 36000000, 216023850, 1377968641, 8411571224, 54080432704, 334469528520, 2163643890489, 13517662791690, 87865126849600, 553380551724110, 3610810383420361]

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

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