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 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 22 |
| 5 | 42 |
| 6 | 78 |
| 7 | 146 |
| 8 | 264 |
| 9 | 490 |
| 10 | 894 |
| 11 | 1646 |
| 12 | 3012 |
| 13 | 5528 |
| 14 | 10086 |
| 15 | 18476 |
| 16 | 33648 |
| 17 | 61472 |
| 18 | 111702 |
| 19 | 203552 |
| 20 | 368872 |
| 21 | 670538 |
| 22 | 1213118 |
| 23 | 2201208 |
| 24 | 3980380 |
| 25 | 7214200 |
| 26 | 13044916 |
| 27 | 23627064 |
| 28 | 42714902 |
| 29 | 77316682 |
| 30 | 139695536 |
| 31 | 252664214 |
| 32 | 456138008 |
| 33 | 824332804 |
| 34 | 1487051098 |
| 35 | 2685425808 |