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.

A009752 Expansion of e.g.f. tan(x)*x (even powers only).

Table of values

n a(n)
0 0
1 2
2 8
3 96
4 2176
5 79360
6 4245504
7 313155584
8 30460116992
9 3777576173568
10 581777702256640
11 108932957168730112
12 24370173276164456448
13 6419958484945407574016
14 1967044844910430876860416
15 693575525634287935244206080
16 278846808228005417477465964544
17 126799861926498005417315327279104

List of values

[0, 2, 8, 96, 2176, 79360, 4245504, 313155584, 30460116992, 3777576173568, 581777702256640, 108932957168730112, 24370173276164456448, 6419958484945407574016, 1967044844910430876860416, 693575525634287935244206080, 278846808228005417477465964544, 126799861926498005417315327279104]

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

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