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.

A255989 Number of length n+5 0..1 arrays with at most one downstep in every 5 consecutive neighbor pairs.

Table of values

n a(n)
1 42
2 68
3 114
4 196
5 337
6 568
7 945
8 1574
9 2645
10 4476
11 7568
12 12736
13 21365
14 35852
15 60308
16 101608
17 171148
18 287940
19 484045
20 813826
21 1369115
22 2304172
23 3877545
24 6523278
25 10972180
26 18456064
27 31049291
28 52240182
29 87891550
30 147861804
31 248739774

List of values

[42, 68, 114, 196, 337, 568, 945, 1574, 2645, 4476, 7568, 12736, 21365, 35852, 60308, 101608, 171148, 287940, 484045, 813826, 1369115, 2304172, 3877545, 6523278, 10972180, 18456064, 31049291, 52240182, 87891550, 147861804, 248739774]