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.

A207734 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically.

Table of values

n a(n)
1 31
2 961
3 2449
4 6241
5 88243
6 1247689
7 4799749
8 18464209
9 184732327
10 1848226081
11 8873643337
12 42603849649
13 355158126283
14 2960701807561
15 16146759616669
16 88059474768001
17 662598445609375
18 4985683837890625
19 29297113012890625

List of values

[31, 961, 2449, 6241, 88243, 1247689, 4799749, 18464209, 184732327, 1848226081, 8873643337, 42603849649, 355158126283, 2960701807561, 16146759616669, 88059474768001, 662598445609375, 4985683837890625, 29297113012890625]

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

Content is available under The OEIS End-User License Agreement.