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.
n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 18 |
3 | 420 |
4 | 16200 |
5 | 1138320 |
6 | 152681760 |
7 | 40012315200 |
8 | 20727639504000 |
9 | 21349793828563200 |
10 | 43852643645542617600 |
11 | 179883715700853141120000 |
12 | 1474687052822610564537600000 |
13 | 24170122236238340825650936320000 |
14 | 792151597973733707815459821941760000 |
15 | 51919200227802645600849976559054284800000 |