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 | 2 |
| 2 | 5 |
| 3 | 12 |
| 4 | 29 |
| 5 | 70 |
| 6 | 169 |
| 7 | 409 |
| 8 | 995 |
| 9 | 2439 |
| 10 | 6033 |
| 11 | 15068 |
| 12 | 38005 |
| 13 | 96807 |
| 14 | 249049 |
| 15 | 647137 |
| 16 | 1698303 |
| 17 | 4500410 |
| 18 | 12038113 |
| 19 | 32489271 |
| 20 | 88423967 |
| 21 | 242549338 |
| 22 | 670146047 |
| 23 | 1863859739 |
| 24 | 5215185383 |
| 25 | 14671904315 |
| 26 | 41478618523 |
| 27 | 117776926366 |
| 28 | 335729266137 |