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.

A189154 Number of n X 2 binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally.

Table of values

n a(n)
1 4
2 16
3 64
4 225
5 784
6 2704
7 9216
8 31329
9 106276
10 360000
11 1218816
12 4124961
13 13957696
14 47224384
15 159769600
16 540516001
17 1828588644
18 6186137104
19 20927672896
20 70798034241
21 239508444816
22 810252019600
23 2741064339456
24 9272956793409

List of values

[4, 16, 64, 225, 784, 2704, 9216, 31329, 106276, 360000, 1218816, 4124961, 13957696, 47224384, 159769600, 540516001, 1828588644, 6186137104, 20927672896, 70798034241, 239508444816, 810252019600, 2741064339456, 9272956793409]

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

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