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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.

A218309 E.g.f. A(x) satisfies A( x/(exp(3*x)*cosh(3*x)) ) = exp(4*x)*cosh(4*x).

Table of values

n a(n)
0 1
1 4
2 56
3 1264
4 40640
5 1711744
6 89533184
7 5607463936
8 409621790720
9 34218229227520
10 3219000547131392
11 336858779869020160
12 38823224436435845120
13 4886982191317154529280
14 667188807538423365632000
15 98200163047169655115350016
16 15501781660715229538766815232

List of values

[1, 4, 56, 1264, 40640, 1711744, 89533184, 5607463936, 409621790720, 34218229227520, 3219000547131392, 336858779869020160, 38823224436435845120, 4886982191317154529280, 667188807538423365632000, 98200163047169655115350016, 15501781660715229538766815232]

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

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