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 | 1 |
1 | 1 |
2 | 4 |
3 | 20 |
4 | 126 |
5 | 972 |
6 | 8876 |
7 | 93580 |
8 | 1119328 |
9 | 14986944 |
10 | 222184136 |
11 | 3614288272 |
12 | 64022264176 |
13 | 1226914925840 |
14 | 25295189791296 |
15 | 558317369479616 |
16 | 13136590271813856 |
17 | 328243850207690432 |
18 | 8680766764223956416 |
19 | 242245419192494844096 |
20 | 7113910552105144027136 |
21 | 219304957649505551899136 |
22 | 7081169542830272102170752 |
23 | 238996807468258679150596352 |