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.

A335636 Expansion of e.g.f. Product_{k>0} 1/(1 - tan(x)^k / k).

Table of values

n a(n)
0 1
1 1
2 3
3 13
4 80
5 560
6 4972
7 48060
8 552632
9 6813560
10 95846728
11 1435488184
12 23855755040
13 419889384096
14 8048166402304
15 162616435301824
16 3531256457687168
17 80497793591765120
18 1953028123616286592
19 49561115477458450560
20 1328614915154244276224
21 37134707962379971432448

List of values

[1, 1, 3, 13, 80, 560, 4972, 48060, 552632, 6813560, 95846728, 1435488184, 23855755040, 419889384096, 8048166402304, 162616435301824, 3531256457687168, 80497793591765120, 1953028123616286592, 49561115477458450560, 1328614915154244276224, 37134707962379971432448]

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

Content is available under The OEIS End-User License Agreement.