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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.

A335638 Expansion of e.g.f. Product_{k>0} (1 + tan(x)^k / k).

Table of values

n a(n)
0 1
1 1
2 1
3 7
4 22
5 190
6 1170
7 11646
8 109520
9 1289168
10 16018064
11 223757840
12 3407971488
13 55709905056
14 998011344928
15 18778681069024
16 385316251841536
17 8225863823985664
18 189755182485906432
19 4538893733746003968
20 116147781156885837824
21 3078530007519830730752
22 86521073899573883088896

List of values

[1, 1, 1, 7, 22, 190, 1170, 11646, 109520, 1289168, 16018064, 223757840, 3407971488, 55709905056, 998011344928, 18778681069024, 385316251841536, 8225863823985664, 189755182485906432, 4538893733746003968, 116147781156885837824, 3078530007519830730752, 86521073899573883088896]

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

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