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.

A270598 E.g.f.: Product_{k>0} (1 + tanh(x^k/k)).

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 14
5 70
6 364
7 2548
8 21104
9 189936
10 1830968
11 20140648
12 241712272
13 3142259536
14 43472528384
15 652087925760
16 10396900456448
17 176747307759616
18 3162885135453952
19 60094817573625088
20 1198006583353972736
21 25158138250433427456
22 551506339507727783936

List of values

[1, 1, 1, 3, 14, 70, 364, 2548, 21104, 189936, 1830968, 20140648, 241712272, 3142259536, 43472528384, 652087925760, 10396900456448, 176747307759616, 3162885135453952, 60094817573625088, 1198006583353972736, 25158138250433427456, 551506339507727783936]