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 | 3 |
| 2 | 6 |
| 3 | 7 |
| 4 | 35 |
| 5 | 66 |
| 6 | 76 |
| 7 | 502 |
| 8 | 952 |
| 9 | 1063 |
| 10 | 9067 |
| 11 | 17347 |
| 12 | 18996 |
| 13 | 199826 |
| 14 | 384870 |
| 15 | 415618 |
| 16 | 5202154 |
| 17 | 10069003 |
| 18 | 10762714 |
| 19 | 156217515 |
| 20 | 303515018 |
| 21 | 321895220 |
| 22 | 5315503943 |
| 23 | 10358584169 |
| 24 | 10918147744 |
| 25 | 202115644015 |
| 26 | 394835308580 |
| 27 | 414085365153 |
| 28 | 8493248958168 |
| 29 | 16625236738313 |
| 30 | 17363808016482 |