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.

A232077 Number of (1+1) X (n+1) 0..1 arrays with every element equal to some horizontal, diagonal or antidiagonal neighbor, with top left element zero.

Table of values

n a(n)
1 3
2 15
3 46
4 161
5 601
6 2208
7 8053
8 29415
9 107534
10 393061
11 1436589
12 5250624
13 19190841
14 70141747
15 256364934
16 937002409
17 3424702513
18 12517136672
19 45749581901
20 167212702063
21 611155044830
22 2233744710845
23 8164238313221
24 29839930638080

List of values

[3, 15, 46, 161, 601, 2208, 8053, 29415, 107534, 393061, 1436589, 5250624, 19190841, 70141747, 256364934, 937002409, 3424702513, 12517136672, 45749581901, 167212702063, 611155044830, 2233744710845, 8164238313221, 29839930638080]

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

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