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.

A254216 Number of length n 1..(6+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.

Table of values

n a(n)
1 4
2 8
3 32
4 96
5 373
6 1472
7 6490
8 28190
9 109811
10 428042
11 1877657
12 8933652
13 41803166
14 184319728
15 792231146
16 3584762414
17 17422197427
18 85469221254
19 398370084189
20 1733366825266
21 7251337491976
22 32000172689890
23 165843262226680
24 977297442443092
25 5688296579514244

List of values

[4, 8, 32, 96, 373, 1472, 6490, 28190, 109811, 428042, 1877657, 8933652, 41803166, 184319728, 792231146, 3584762414, 17422197427, 85469221254, 398370084189, 1733366825266, 7251337491976, 32000172689890, 165843262226680, 977297442443092, 5688296579514244]