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.

A133515 Number of n X n binary matrices with every 1 vertically or horizontally adjacent to some 0.

Table of values

n a(n)
1 1
2 11
3 291
4 28661
5 10982565
6 16031828359
7 89373230342147
8 1904212088591018521
9 155026375803222057878889
10 48225130114674924906540348115
11 57322477811272486520770053115140403
12 260351257812272076026660518356378279922077

List of values

[1, 11, 291, 28661, 10982565, 16031828359, 89373230342147, 1904212088591018521, 155026375803222057878889, 48225130114674924906540348115, 57322477811272486520770053115140403, 260351257812272076026660518356378279922077]

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

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