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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.

A296793 a(n) = n! * [x^n] exp(x)*(sec(x) + tan(x))^n.

Table of values

n a(n)
0 1
1 2
2 9
3 67
4 705
5 9601
6 160429
7 3175579
8 72638209
9 1884974185
10 54709142101
11 1755923320559
12 61748847320545
13 2360991253910069
14 97518218630249005
15 4327060674324941491
16 205272207854416078849
17 10367500700785078039473
18 555414837143457708584101
19 31458118283019682610004279

List of values

[1, 2, 9, 67, 705, 9601, 160429, 3175579, 72638209, 1884974185, 54709142101, 1755923320559, 61748847320545, 2360991253910069, 97518218630249005, 4327060674324941491, 205272207854416078849, 10367500700785078039473, 555414837143457708584101, 31458118283019682610004279]

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

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