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 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 11 |
| 6 | 21 |
| 7 | 40 |
| 8 | 73 |
| 9 | 144 |
| 10 | 274 |
| 11 | 509 |
| 12 | 931 |
| 13 | 1771 |
| 14 | 3555 |
| 15 | 7021 |
| 16 | 13964 |
| 17 | 27789 |
| 18 | 54536 |
| 19 | 105854 |
| 20 | 210655 |
| 21 | 415349 |
| 22 | 812461 |
| 23 | 1578752 |
| 24 | 3050921 |
| 25 | 5868562 |
| 26 | 11244267 |
| 27 | 21472441 |
| 28 | 40887802 |
| 29 | 77668032 |
| 30 | 147222550 |
| 31 | 278556477 |
| 32 | 540784632 |
| 33 | 1116709696 |
| 34 | 2292646735 |
| 35 | 4682550808 |
| 36 | 9519363902 |