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 | 2 |
| 1 | 3 |
| 2 | 11 |
| 3 | 23 |
| 4 | 59 |
| 5 | 149 |
| 6 | 409 |
| 7 | 1097 |
| 8 | 2999 |
| 9 | 8111 |
| 10 | 22027 |
| 11 | 59879 |
| 12 | 162779 |
| 13 | 442439 |
| 14 | 1202609 |
| 15 | 3269029 |
| 16 | 8886113 |
| 17 | 24154957 |
| 18 | 65660003 |
| 19 | 178482319 |
| 20 | 485165237 |
| 21 | 1318815761 |
| 22 | 3584912873 |
| 23 | 9744803489 |
| 24 | 26489122147 |
| 25 | 72004899361 |
| 26 | 195729609461 |
| 27 | 532048240609 |
| 28 | 1446257064299 |
| 29 | 3931334297161 |