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 | 272 |
| 2 | 24611 |
| 3 | 515086 |
| 4 | 4456448 |
| 5 | 23750912 |
| 6 | 93241002 |
| 7 | 296327464 |
| 8 | 806453248 |
| 9 | 1951153920 |
| 10 | 4300685074 |
| 11 | 8787223186 |
| 12 | 16878338048 |
| 13 | 30768878848 |
| 14 | 53624926972 |
| 15 | 89982082488 |
| 16 | 146028888064 |
| 17 | 230022888960 |
| 18 | 353194774434 |
| 19 | 529896144586 |