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.

A255108 Number of length n+1 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.

Table of values

n a(n)
1 9
2 26
3 66
4 147
5 294
6 540
7 927
8 1507
9 2343
10 3510
11 5096
12 7203
13 9948
14 13464
15 17901
16 23427
17 30229
18 38514
19 48510
20 60467
21 74658
22 91380
23 110955
24 133731
25 160083
26 190414
27 225156
28 264771
29 309752
30 360624
31 417945
32 482307
33 554337
34 634698
35 724090
36 823251
37 932958

List of values

[9, 26, 66, 147, 294, 540, 927, 1507, 2343, 3510, 5096, 7203, 9948, 13464, 17901, 23427, 30229, 38514, 48510, 60467, 74658, 91380, 110955, 133731, 160083, 190414, 225156, 264771, 309752, 360624, 417945, 482307, 554337, 634698, 724090, 823251, 932958]

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

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