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 | 4 |
| 3 | 7 |
| 4 | 13 |
| 5 | 23 |
| 6 | 44 |
| 7 | 84 |
| 8 | 161 |
| 9 | 313 |
| 10 | 609 |
| 11 | 1189 |
| 12 | 2327 |
| 13 | 4562 |
| 14 | 8958 |
| 15 | 17614 |
| 16 | 34673 |
| 17 | 68318 |
| 18 | 134724 |
| 19 | 265878 |
| 20 | 525066 |
| 21 | 1037554 |
| 22 | 2051390 |
| 23 | 4057939 |
| 24 | 8030892 |
| 25 | 15900354 |
| 26 | 31493446 |
| 27 | 62400953 |
| 28 | 123682583 |
| 29 | 245223436 |
| 30 | 486342641 |
| 31 | 964809156 |
| 32 | 1914483817 |
| 33 | 3799849586 |
| 34 | 7543612064 |
| 35 | 14979070587 |
| 36 | 29749371096 |
| 37 | 59095356237 |
| 38 | 117410567231 |