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.

A307575 Number of Motzkin meanders of length n with an even number of peaks.

Table of values

n a(n)
0 1
1 2
2 4
3 9
4 22
5 56
6 148
7 402
8 1112
9 3118
10 8832
11 25205
12 72342
13 208560
14 603404
15 1750785
16 5092046
17 14839710
18 43321976
19 126661355
20 370813762
21 1086877792
22 3189091724
23 9366371000
24 27533212140
25 81001276874
26 238478223648
27 702592110803
28 2071257446234
29 6109731270056

List of values

[1, 2, 4, 9, 22, 56, 148, 402, 1112, 3118, 8832, 25205, 72342, 208560, 603404, 1750785, 5092046, 14839710, 43321976, 126661355, 370813762, 1086877792, 3189091724, 9366371000, 27533212140, 81001276874, 238478223648, 702592110803, 2071257446234, 6109731270056]