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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.

A068472 Number of n X n binary matrices with every 1 having at most 3 adjacent 1's.

Table of values

n a(n)
0 1
1 2
2 16
3 496
4 58640
5 26536192
6 45851039232
7 302758305892480
8 7638804476736307712
9 736437724731312162567680
10 271287639195997221896855543808
11 381862430868672544566361613406502912

List of values

[1, 2, 16, 496, 58640, 26536192, 45851039232, 302758305892480, 7638804476736307712, 736437724731312162567680, 271287639195997221896855543808, 381862430868672544566361613406502912]

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

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