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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 8 |
| 6 | 13 |
| 7 | 19 |
| 8 | 85 |
| 9 | 258 |
| 10 | 393 |
| 11 | 828 |
| 12 | 1811 |
| 13 | 2538 |
| 14 | 2916 |
| 15 | 2986 |
| 16 | 3627 |
| 17 | 4540 |
| 18 | 10503 |
| 19 | 140833 |
| 20 | 268865 |
| 21 | 298436 |
| 22 | 423437 |
| 23 | 902696 |
| 24 | 1050503 |
| 25 | 1845571 |
| 26 | 2491032 |
| 27 | 5513951 |
| 28 | 14365940 |
| 29 | 25809892 |
| 30 | 26237622 |
| 31 | 28559254 |
| 32 | 61875091 |
| 33 | 79094282 |
| 34 | 186062629 |
| 35 | 246553448 |
| 36 | 451977320 |
| 37 | 452357920 |
| 38 | 620208559 |
| 39 | 813448358 |
| 40 | 849937635 |