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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 6 |
| 6 | 37 |
| 7 | 50 |
| 8 | 345 |
| 9 | 502 |
| 10 | 3851 |
| 11 | 5897 |
| 12 | 49854 |
| 13 | 79249 |
| 14 | 730745 |
| 15 | 1195147 |
| 16 | 11915997 |
| 17 | 19929390 |
| 18 | 213332101 |
| 19 | 363275555 |
| 20 | 4150104224 |
| 21 | 7172334477 |
| 22 | 87003759195 |
| 23 | 152231458128 |
| 24 | 1952292972199 |
| 25 | 3451893361661 |
| 26 | 46625594567852 |
| 27 | 83183249675125 |
| 28 | 1179506183956655 |
| 29 | 2120758970878892 |