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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 13 |
| 5 | 30 |
| 6 | 73 |
| 7 | 157 |
| 8 | 345 |
| 9 | 743 |
| 10 | 1650 |
| 11 | 3517 |
| 12 | 7593 |
| 13 | 16120 |
| 14 | 34294 |
| 15 | 72683 |
| 16 | 153475 |
| 17 | 323293 |
| 18 | 679231 |
| 19 | 1423721 |
| 20 | 2977692 |
| 21 | 6218395 |
| 22 | 12959249 |
| 23 | 26970243 |
| 24 | 56037071 |
| 25 | 116280086 |
| 26 | 240953162 |
| 27 | 498719275 |
| 28 | 1031029386 |
| 29 | 2129266321 |
| 30 | 4392871427 |
| 31 | 9054428894 |
| 32 | 18645998093 |