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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 44 |
| 7 | 82 |
| 8 | 146 |
| 9 | 252 |
| 10 | 423 |
| 11 | 695 |
| 12 | 1116 |
| 13 | 1763 |
| 14 | 2738 |
| 15 | 4192 |
| 16 | 6334 |
| 17 | 9459 |
| 18 | 13968 |
| 19 | 20425 |
| 20 | 29588 |
| 21 | 42496 |
| 22 | 60547 |
| 23 | 85628 |
| 24 | 120246 |
| 25 | 167762 |
| 26 | 232605 |
| 27 | 320635 |
| 28 | 439544 |
| 29 | 599412 |
| 30 | 813360 |
| 31 | 1098480 |
| 32 | 1476870 |
| 33 | 1977087 |
| 34 | 2635869 |
| 35 | 3500382 |
| 36 | 4630932 |
| 37 | 6104533 |
| 38 | 8019131 |
| 39 | 10499093 |