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 | 3 |
| 3 | 7 |
| 4 | 15 |
| 5 | 36 |
| 6 | 81 |
| 7 | 197 |
| 8 | 455 |
| 9 | 1105 |
| 10 | 2618 |
| 11 | 6315 |
| 12 | 15141 |
| 13 | 36570 |
| 14 | 88161 |
| 15 | 213342 |
| 16 | 516247 |
| 17 | 1251728 |
| 18 | 3037059 |
| 19 | 7378290 |
| 20 | 17938430 |
| 21 | 43655465 |
| 22 | 106317863 |
| 23 | 259127707 |
| 24 | 631986437 |
| 25 | 1542364386 |
| 26 | 3766351332 |
| 27 | 9202390342 |
| 28 | 22496047757 |
| 29 | 55020807236 |
| 30 | 134631987776 |
| 31 | 329579227722 |
| 32 | 807142635031 |