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.

A255711 Number of length n 1..(3+2) arrays with no leading partial sum equal to a prime and no consecutive values equal.

Table of values

n a(n)
1 2
2 4
3 10
4 21
5 47
6 102
7 256
8 754
9 2169
10 5999
11 17237
12 49510
13 132956
14 339522
15 900236
16 2620855
17 8077245
18 24619352
19 71983144
20 205409149
21 584195761
22 1647027286
23 4572955010
24 12705583667
25 36182897964
26 106766407391
27 326242477740

List of values

[2, 4, 10, 21, 47, 102, 256, 754, 2169, 5999, 17237, 49510, 132956, 339522, 900236, 2620855, 8077245, 24619352, 71983144, 205409149, 584195761, 1647027286, 4572955010, 12705583667, 36182897964, 106766407391, 326242477740]

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

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