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.

A094309 Number of (s(0), s(1), ..., s(n)) such that 0 < s(i) < 6 and |s(i) - s(i-1)| <= 1 for i = 1,2,...,n, s(0) = 2, s(n) = 5.

Table of values

n a(n)
3 1
4 4
5 14
6 44
7 132
8 384
9 1096
10 3088
11 8624
12 23936
13 66144
14 182208
15 500800
16 1374208
17 3766400
18 10313984
19 28226304
20 77211648
21 211138048
22 577223680
23 1577772032
24 4312088576
25 11783915520
26 32200396800
27 87985401856
28 240405151744

List of values

[1, 4, 14, 44, 132, 384, 1096, 3088, 8624, 23936, 66144, 182208, 500800, 1374208, 3766400, 10313984, 28226304, 77211648, 211138048, 577223680, 1577772032, 4312088576, 11783915520, 32200396800, 87985401856, 240405151744]