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) |
|---|---|
| 1 | 1 |
| 2 | 26 |
| 3 | 307 |
| 4 | 3004 |
| 5 | 27049 |
| 6 | 232658 |
| 7 | 1947103 |
| 8 | 16021784 |
| 9 | 130447957 |
| 10 | 1055068574 |
| 11 | 8498016971 |
| 12 | 68269451044 |
| 13 | 547562782017 |
| 14 | 4387403277994 |
| 15 | 35132904838583 |
| 16 | 281226897433648 |
| 17 | 2250607478637613 |
| 18 | 18008682685966262 |
| 19 | 144087851840540835 |
| 20 | 1152791046751807804 |
| 21 | 9222750661998396185 |
| 22 | 73784021962658308290 |