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.

A200833 Number of 0..3 arrays x(0..n+1) of n+2 elements without any two consecutive increases or two consecutive decreases.

Table of values

n a(n)
1 56
2 194
3 676
4 2356
5 8210
6 28610
7 99700
8 347434
9 1210736
10 4219166
11 14702926
12 51236674
13 178549274
14 622207508
15 2168265232
16 7555958512
17 26330961818
18 91757987972
19 319757721532
20 1114289913490
21 3883071237050
22 13531704854780

List of values

[56, 194, 676, 2356, 8210, 28610, 99700, 347434, 1210736, 4219166, 14702926, 51236674, 178549274, 622207508, 2168265232, 7555958512, 26330961818, 91757987972, 319757721532, 1114289913490, 3883071237050, 13531704854780]

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

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