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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.

A325155 G.f. A(x) satisfies: x = Sum_{n>=1} x^n * (1+x)^(n^2/2) / A(x)^(n/2).

Table of values

n a(n)
0 1
1 3
2 5
3 7
4 11
5 21
6 49
7 133
8 408
9 1376
10 5020
11 19564
12 80741
13 350551
14 1593066
15 7547792
16 37163568
17 189662934
18 1001046684
19 5453972462
20 30622950955
21 176942133603
22 1050773432990
23 6405898358012
24 40048848677954
25 256521565555908
26 1681897617101795
27 11278819380424173
28 77301464920178158
29 541084956406886214
30 3865540113371340736
31 28167799470180443028
32 209238063076396838375
33 1583562040116769584091
34 12204247180832799551059
35 95731651337427271893873

List of values

[1, 3, 5, 7, 11, 21, 49, 133, 408, 1376, 5020, 19564, 80741, 350551, 1593066, 7547792, 37163568, 189662934, 1001046684, 5453972462, 30622950955, 176942133603, 1050773432990, 6405898358012, 40048848677954, 256521565555908, 1681897617101795, 11278819380424173, 77301464920178158, 541084956406886214, 3865540113371340736, 28167799470180443028, 209238063076396838375, 1583562040116769584091, 12204247180832799551059, 95731651337427271893873]

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