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 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 1 |
| 6 | 3 |
| 7 | 7 |
| 8 | 10 |
| 9 | 12 |
| 10 | 23 |
| 11 | 31 |
| 12 | 58 |
| 13 | 93 |
| 14 | 171 |
| 15 | 243 |
| 16 | 422 |
| 17 | 634 |
| 18 | 1142 |
| 19 | 1684 |
| 20 | 2971 |
| 21 | 4406 |
| 22 | 7768 |
| 23 | 11502 |
| 24 | 20502 |
| 25 | 30242 |
| 26 | 53039 |
| 27 | 79161 |
| 28 | 138410 |
| 29 | 207536 |
| 30 | 362391 |
| 31 | 544895 |
| 32 | 947189 |
| 33 | 1431794 |
| 34 | 2473232 |
| 35 | 3749944 |
| 36 | 6459373 |
| 37 | 9823917 |
| 38 | 16879245 |
| 39 | 25745781 |
| 40 | 44112347 |