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 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 20 |
| 7 | 46 |
| 8 | 106 |
| 9 | 248 |
| 10 | 583 |
| 11 | 1393 |
| 12 | 3343 |
| 13 | 8111 |
| 14 | 19801 |
| 15 | 48719 |
| 16 | 120489 |
| 17 | 299787 |
| 18 | 749258 |
| 19 | 1881216 |
| 20 | 4741340 |
| 21 | 11993672 |
| 22 | 30436507 |
| 23 | 77471471 |
| 24 | 197726053 |
| 25 | 505917729 |
| 26 | 1297471092 |
| 27 | 3334630086 |
| 28 | 8587369072 |
| 29 | 22155278381 |
| 30 | 57259037225 |
| 31 | 148222036272 |
| 32 | 384272253397 |