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.

A219129 Number of 2 X n arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random 0..2 2 X n array.

Table of values

n a(n)
1 9
2 15
3 87
4 205
5 899
6 2521
7 9709
8 29747
9 107261
10 344055
11 1199763
12 3940341
13 13507819
14 44905025
15 152598957
16 510467683
17 1726955485
18 5795447559
19 19561570195
20 65753998917
21 221680877531
22 745782497713
23 2512791313869
24 8457223721011

List of values

[9, 15, 87, 205, 899, 2521, 9709, 29747, 107261, 344055, 1199763, 3940341, 13507819, 44905025, 152598957, 510467683, 1726955485, 5795447559, 19561570195, 65753998917, 221680877531, 745782497713, 2512791313869, 8457223721011]

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

Content is available under The OEIS End-User License Agreement.