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.

A207248 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.

Table of values

n a(n)
1 2
2 16
3 102
4 940
5 9072
6 101036
7 1231650
8 16436824
9 237255370
10 3684061372
11 61152471648
12 1079792961548
13 20191392448058
14 398344602963240
15 8263930584283206
16 179759826117751524
17 4089350929606635216

List of values

[2, 16, 102, 940, 9072, 101036, 1231650, 16436824, 237255370, 3684061372, 61152471648, 1079792961548, 20191392448058, 398344602963240, 8263930584283206, 179759826117751524, 4089350929606635216]

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

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