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 | 3 |
| 2 | 9 |
| 3 | 16 |
| 4 | 29 |
| 5 | 56 |
| 6 | 110 |
| 7 | 225 |
| 8 | 469 |
| 9 | 991 |
| 10 | 2110 |
| 11 | 4511 |
| 12 | 9666 |
| 13 | 20736 |
| 14 | 44511 |
| 15 | 95575 |
| 16 | 205253 |
| 17 | 440828 |
| 18 | 946817 |
| 19 | 2033628 |
| 20 | 4367986 |
| 21 | 9381949 |
| 22 | 20151433 |
| 23 | 43283195 |
| 24 | 92967882 |
| 25 | 199685571 |
| 26 | 428904390 |
| 27 | 921243268 |
| 28 | 1978737467 |
| 29 | 4250128235 |
| 30 | 9128846273 |
| 31 | 19607840040 |
| 32 | 42115660645 |