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 | 3 |
| 2 | 4 |
| 3 | 6 |
| 4 | 9 |
| 5 | 15 |
| 6 | 24 |
| 7 | 42 |
| 8 | 72 |
| 9 | 128 |
| 10 | 227 |
| 11 | 413 |
| 12 | 748 |
| 13 | 1378 |
| 14 | 2539 |
| 15 | 4721 |
| 16 | 8801 |
| 17 | 16511 |
| 18 | 31043 |
| 19 | 58637 |
| 20 | 111014 |
| 21 | 210872 |
| 22 | 401429 |
| 23 | 766151 |
| 24 | 1465021 |
| 25 | 2807197 |
| 26 | 5387992 |
| 27 | 10359000 |
| 28 | 19945395 |
| 29 | 38458185 |
| 30 | 74248452 |
| 31 | 143522118 |
| 32 | 277737798 |
| 33 | 538038784 |
| 34 | 1043325199 |