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 | 1 |
| 5 | 2 |
| 6 | 6 |
| 7 | 16 |
| 8 | 36 |
| 9 | 75 |
| 10 | 163 |
| 11 | 391 |
| 12 | 991 |
| 13 | 2498 |
| 14 | 6150 |
| 15 | 15016 |
| 16 | 37116 |
| 17 | 93482 |
| 18 | 238154 |
| 19 | 608074 |
| 20 | 1551370 |
| 21 | 3964200 |
| 22 | 10176384 |
| 23 | 26261500 |
| 24 | 68034484 |
| 25 | 176661828 |
| 26 | 459534596 |
| 27 | 1197777556 |
| 28 | 3129475636 |
| 29 | 8195867902 |
| 30 | 21508247446 |
| 31 | 56540427826 |
| 32 | 148863643466 |
| 33 | 392539322259 |
| 34 | 1036662269875 |
| 35 | 2741706892035 |