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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.

A319437 Number of series-reduced palindromic plane trees with n nodes.

Table of values

n a(n)
1 1
2 0
3 1
4 1
5 1
6 2
7 3
8 4
9 7
10 10
11 15
12 23
13 35
14 52
15 81
16 121
17 185
18 280
19 427
20 645
21 985
22 1490
23 2269
24 3440
25 5233
26 7936
27 12071
28 18313
29 27839
30 42256
31 64217
32 97490
33 148137
34 224924
35 341725
36 518923
37 788321
38 1197178
39 1818597
40 2761926
41 4195381
42 6371808
43 9678537
44 14699771

List of values

[1, 0, 1, 1, 1, 2, 3, 4, 7, 10, 15, 23, 35, 52, 81, 121, 185, 280, 427, 645, 985, 1490, 2269, 3440, 5233, 7936, 12071, 18313, 27839, 42256, 64217, 97490, 148137, 224924, 341725, 518923, 788321, 1197178, 1818597, 2761926, 4195381, 6371808, 9678537, 14699771]

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

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