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.

A236357 E.g.f. satisfies: sin(x + A(x)) = A(x)^2.

Table of values

n a(n)
1 -1
2 2
3 -12
4 120
5 -1680
6 30360
7 -672000
8 17599680
9 -532224000
10 18248902560
11 -699544581120
12 29645099003520
13 -1376154991411200
14 69445751181206400
15 -3785191236642816000
16 221613328121888102400
17 -13870531255760776396800
18 924194452386724174656000

List of values

[-1, 2, -12, 120, -1680, 30360, -672000, 17599680, -532224000, 18248902560, -699544581120, 29645099003520, -1376154991411200, 69445751181206400, -3785191236642816000, 221613328121888102400, -13870531255760776396800, 924194452386724174656000]