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 | 0 |
| 4 | 1 |
| 5 | 5 |
| 6 | 16 |
| 7 | 43 |
| 8 | 106 |
| 9 | 240 |
| 10 | 516 |
| 11 | 1060 |
| 12 | 2108 |
| 13 | 4064 |
| 14 | 7641 |
| 15 | 14036 |
| 16 | 25253 |
| 17 | 44560 |
| 18 | 77245 |
| 19 | 131658 |
| 20 | 220883 |
| 21 | 365027 |
| 22 | 594674 |
| 23 | 955649 |
| 24 | 1515908 |
| 25 | 2374875 |
| 26 | 3676632 |
| 27 | 5627587 |
| 28 | 8520689 |
| 29 | 12767557 |
| 30 | 18941641 |
| 31 | 27834607 |
| 32 | 40530902 |
| 33 | 58503994 |
| 34 | 83741461 |
| 35 | 118904892 |
| 36 | 167534794 |
| 37 | 234309554 |
| 38 | 325373538 |
| 39 | 448747606 |