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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 7 |
| 6 | 14 |
| 7 | 31 |
| 8 | 67 |
| 9 | 146 |
| 10 | 331 |
| 11 | 760 |
| 12 | 1749 |
| 13 | 4072 |
| 14 | 9583 |
| 15 | 22673 |
| 16 | 53929 |
| 17 | 129055 |
| 18 | 310328 |
| 19 | 749152 |
| 20 | 1815481 |
| 21 | 4415313 |
| 22 | 10771564 |
| 23 | 26352955 |
| 24 | 64644926 |
| 25 | 158963191 |
| 26 | 391767016 |
| 27 | 967523138 |
| 28 | 2394060433 |
| 29 | 5934576763 |
| 30 | 14735792889 |
| 31 | 36647185192 |
| 32 | 91274339014 |
| 33 | 227645446307 |