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 | 1 |
| 3 | 2 |
| 4 | 13 |
| 5 | 19 |
| 6 | 52 |
| 7 | 412 |
| 8 | 73 |
| 9 | 1405 |
| 10 | 11735 |
| 11 | 20000 |
| 12 | 7300 |
| 13 | 388606 |
| 14 | 664316 |
| 15 | 2325118 |
| 16 | 20832709 |
| 17 | 11815463 |
| 18 | 95438089 |
| 19 | 861817318 |
| 20 | 1495813613 |
| 21 | 5231996647 |
| 22 | 47291366710 |
| 23 | 3025568936 |
| 24 | 199838851432 |
| 25 | 1828302724054 |
| 26 | 3320026962314 |
| 27 | 439614522008 |
| 28 | 73390614310810 |
| 29 | 131344935434920 |
| 30 | 55179693272894 |
| 31 | 3321671735661494 |