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 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 19 |
| 5 | 54 |
| 6 | 141 |
| 7 | 331 |
| 8 | 733 |
| 9 | 1527 |
| 10 | 3060 |
| 11 | 5888 |
| 12 | 11004 |
| 13 | 19978 |
| 14 | 35452 |
| 15 | 61538 |
| 16 | 104875 |
| 17 | 175618 |
| 18 | 289656 |
| 19 | 470914 |
| 20 | 755880 |
| 21 | 1198693 |
| 22 | 1880246 |
| 23 | 2918919 |
| 24 | 4488553 |
| 25 | 6840398 |
| 26 | 10337947 |
| 27 | 15500575 |
| 28 | 23070000 |
| 29 | 34094908 |
| 30 | 50055877 |
| 31 | 73026093 |
| 32 | 105902689 |
| 33 | 152706404 |
| 34 | 219004225 |