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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.

A216409 Expansion of e.g.f. (x/cos(x)) * exp(x*tan(x)) (odd powers only).

Table of values

n a(n)
1 1
2 9
3 185
4 6769
5 384849
6 31247161
7 3421948361
8 485057489505
9 86270172949025
10 18789108183911401
11 4913945007420622425
12 1518613513007413125073
13 547156929866111948071025
14 227227144424871839232479769
15 107701858026047543489146771049

List of values

[1, 9, 185, 6769, 384849, 31247161, 3421948361, 485057489505, 86270172949025, 18789108183911401, 4913945007420622425, 1518613513007413125073, 547156929866111948071025, 227227144424871839232479769, 107701858026047543489146771049]

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

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