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 | 2 |
| 3 | 3 |
| 4 | 9 |
| 5 | 16 |
| 6 | 35 |
| 7 | 65 |
| 8 | 250 |
| 9 | 495 |
| 10 | 1209 |
| 11 | 2412 |
| 12 | 6510 |
| 13 | 13707 |
| 14 | 32467 |
| 15 | 68285 |
| 16 | 176843 |
| 17 | 387518 |
| 18 | 926118 |
| 19 | 2022259 |
| 20 | 4928293 |
| 21 | 11009067 |
| 22 | 25938745 |
| 23 | 57797488 |
| 24 | 137808762 |
| 25 | 311753120 |
| 26 | 730878789 |
| 27 | 1651849769 |
| 28 | 3880235364 |
| 29 | 8842052707 |
| 30 | 20602970440 |
| 31 | 46930887843 |
| 32 | 109406749213 |