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.

A080832 Expansion of e.g.f. exp(x) * (sec(exp(x) - 1))^2.

Table of values

n a(n)
0 1
1 1
2 3
3 13
4 67
5 421
6 3115
7 26349
8 250867
9 2655541
10 30929019
11 393019837
12 5410699075
13 80221867909
14 1274393162827
15 21594697199757
16 388796268801427
17 7411769447027413
18 149143210226032923
19 3159088788867736669

List of values

[1, 1, 3, 13, 67, 421, 3115, 26349, 250867, 2655541, 30929019, 393019837, 5410699075, 80221867909, 1274393162827, 21594697199757, 388796268801427, 7411769447027413, 149143210226032923, 3159088788867736669]

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

Content is available under The OEIS End-User License Agreement.