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.

A207933 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 1 1 vertically.

Table of values

n a(n)
1 42
2 1764
3 6216
4 21904
5 126688
6 732736
7 3773248
8 19430464
9 105642128
10 574369156
11 3050871800
12 16205290000
13 87703589600
14 474654858304
15 2537509425088
16 13565549724736
17 73283287813072
18 395888141775844
19 2122391971076888

List of values

[42, 1764, 6216, 21904, 126688, 732736, 3773248, 19430464, 105642128, 574369156, 3050871800, 16205290000, 87703589600, 474654858304, 2537509425088, 13565549724736, 73283287813072, 395888141775844, 2122391971076888]

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

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