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) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 7 |
| 7 | 18 |
| 8 | 44 |
| 9 | 117 |
| 10 | 299 |
| 11 | 793 |
| 12 | 2095 |
| 13 | 5607 |
| 14 | 15047 |
| 15 | 40708 |
| 16 | 110499 |
| 17 | 301541 |
| 18 | 825784 |
| 19 | 2270211 |
| 20 | 6260800 |
| 21 | 17319689 |
| 22 | 48042494 |
| 23 | 133606943 |
| 24 | 372430476 |
| 25 | 1040426154 |
| 26 | 2912415527 |
| 27 | 8167992598 |
| 28 | 22947778342 |
| 29 | 64577555147 |
| 30 | 182009003773 |
| 31 | 513729375064 |
| 32 | 1452007713130 |