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.

A238317 Number of (n+1)X(2+1) 0..2 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors.

Table of values

n a(n)
1 9
2 67
3 376
4 1867
5 9489
6 50232
7 267174
8 1408341
9 7395987
10 38886701
11 204722786
12 1077853232
13 5673085286
14 29856142160
15 157133586571
16 827031030519
17 4352855509300
18 22909846720541
19 120578232671314
20 634623931681625

List of values

[9, 67, 376, 1867, 9489, 50232, 267174, 1408341, 7395987, 38886701, 204722786, 1077853232, 5673085286, 29856142160, 157133586571, 827031030519, 4352855509300, 22909846720541, 120578232671314, 634623931681625]

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

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