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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.

A046977 Denominators of Taylor series for sec(x). Also denominators of Taylor series for sech(x) = 1/cosh(x).

Table of values

n a(n)
0 1
1 2
2 24
3 720
4 8064
5 3628800
6 95800320
7 87178291200
8 4184557977600
9 6402373705728000
10 97316080327065600
11 1124000727777607680000
12 9545360026665222144000
13 403291461126605635584000000
14 3209350995912777478963200000
15 265252859812191058636308480000000

List of values

[1, 2, 24, 720, 8064, 3628800, 95800320, 87178291200, 4184557977600, 6402373705728000, 97316080327065600, 1124000727777607680000, 9545360026665222144000, 403291461126605635584000000, 3209350995912777478963200000, 265252859812191058636308480000000]

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

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