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 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 14 |
| 5 | 34 |
| 6 | 68 |
| 7 | 150 |
| 8 | 296 |
| 9 | 586 |
| 10 | 1140 |
| 11 | 2182 |
| 12 | 4130 |
| 13 | 7678 |
| 14 | 14368 |
| 15 | 26068 |
| 16 | 48248 |
| 17 | 86572 |
| 18 | 158146 |
| 19 | 281410 |
| 20 | 509442 |
| 21 | 901014 |
| 22 | 1618544 |
| 23 | 2852464 |
| 24 | 5089580 |
| 25 | 8948694 |
| 26 | 15884762 |
| 27 | 27882762 |
| 28 | 49291952 |
| 29 | 86435358 |
| 30 | 152316976 |
| 31 | 266907560 |
| 32 | 469232204 |
| 33 | 821844316 |