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.

A354519 Expansion of e.g.f. exp(x) * log(sec(x)).

Table of values

n a(n)
1 0
2 1
3 3
4 8
5 20
6 61
7 203
8 888
9 4080
10 24001
11 140283
12 1028048
13 7248020
14 63374221
15 522164243
16 5299033488
17 49924707840
18 576514338721
19 6110861416083
20 79100066353208
21 931434877343540
22 13355627237749501
23 172948115797623803
24 2720827878727067208
25 38424408320191299120

List of values

[0, 1, 3, 8, 20, 61, 203, 888, 4080, 24001, 140283, 1028048, 7248020, 63374221, 522164243, 5299033488, 49924707840, 576514338721, 6110861416083, 79100066353208, 931434877343540, 13355627237749501, 172948115797623803, 2720827878727067208, 38424408320191299120]

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

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