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.

A307593 Expansion of e.g.f. (sec(x) + tan(x))*exp(x)/(1 - x).

Table of values

n a(n)
0 1
1 3
2 10
3 39
4 180
5 977
6 6156
7 44401
8 361872
9 3295025
10 33193284
11 366828033
12 4414938000
13 57501795977
14 805984165252
15 12098920460089
16 193676009792768
17 3293501718960033
18 59294599560573508
19 1126737323074730161
20 22536528123718353104
21 473290909667471110361

List of values

[1, 3, 10, 39, 180, 977, 6156, 44401, 361872, 3295025, 33193284, 366828033, 4414938000, 57501795977, 805984165252, 12098920460089, 193676009792768, 3293501718960033, 59294599560573508, 1126737323074730161, 22536528123718353104, 473290909667471110361]

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

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