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.

A012782 exp(sec(x)*arcsin(x))=1+x+1/2!*x^2+5/3!*x^3+17/4!*x^4+85/5!*x^5...

Table of values

n a(n)
0 1
1 1
2 1
3 5
4 17
5 85
6 505
7 3201
8 25153
9 204905
10 1945265
11 19581949
12 217998673
13 2608398013
14 33522871785
15 463598293497
16 6789373095937
17 106484041306577
18 1755926841763681
19 30821112722260469
20 566210591513987345

List of values

[1, 1, 1, 5, 17, 85, 505, 3201, 25153, 204905, 1945265, 19581949, 217998673, 2608398013, 33522871785, 463598293497, 6789373095937, 106484041306577, 1755926841763681, 30821112722260469, 566210591513987345]