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 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 12 |
| 8 | 25 |
| 9 | 51 |
| 10 | 111 |
| 11 | 240 |
| 12 | 533 |
| 13 | 1181 |
| 14 | 2671 |
| 15 | 6014 |
| 16 | 13795 |
| 17 | 31480 |
| 18 | 72905 |
| 19 | 168361 |
| 20 | 393077 |
| 21 | 914784 |
| 22 | 2150810 |
| 23 | 5040953 |
| 24 | 11914240 |
| 25 | 28089793 |
| 26 | 66702160 |
| 27 | 158013093 |
| 28 | 376777192 |
| 29 | 896262811 |
| 30 | 2144279852 |
| 31 | 5120176632 |
| 32 | 12286984432 |
| 33 | 29428496034 |
| 34 | 70815501209 |