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.

A251094 Number of (n+1) X (2+1) 0..1 arrays with no 2 X 2 subblock having its minimum diagonal element less than its minimum antidiagonal element.

Table of values

n a(n)
1 41
2 212
3 1109
4 5817
5 30517
6 160086
7 839758
8 4405079
9 23107524
10 121214121
11 635847599
12 3335437865
13 17496560104
14 91780937840
15 481451239589
16 2525527648328
17 13248049600905
18 69494712657097
19 364545365754237
20 1912279634115658

List of values

[41, 212, 1109, 5817, 30517, 160086, 839758, 4405079, 23107524, 121214121, 635847599, 3335437865, 17496560104, 91780937840, 481451239589, 2525527648328, 13248049600905, 69494712657097, 364545365754237, 1912279634115658]

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

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