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 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 24 |
| 6 | 49 |
| 7 | 90 |
| 8 | 181 |
| 9 | 335 |
| 10 | 671 |
| 11 | 1253 |
| 12 | 2507 |
| 13 | 4718 |
| 14 | 9437 |
| 15 | 17874 |
| 16 | 35749 |
| 17 | 68067 |
| 18 | 136135 |
| 19 | 260337 |
| 20 | 520675 |
| 21 | 999361 |
| 22 | 1998723 |
| 23 | 3848221 |
| 24 | 7696443 |
| 25 | 14857999 |
| 26 | 29715999 |
| 27 | 57500459 |
| 28 | 115000919 |
| 29 | 222981434 |
| 30 | 445962869 |
| 31 | 866262914 |
| 32 | 1732525829 |
| 33 | 3370764539 |
| 34 | 6741529079 |
| 35 | 13135064249 |