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 | 2 |
| 2 | 7 |
| 3 | 17 |
| 4 | 53 |
| 5 | 197 |
| 6 | 373 |
| 7 | 983 |
| 8 | 3803 |
| 9 | 6709 |
| 10 | 17333 |
| 11 | 43783 |
| 12 | 103681 |
| 13 | 317789 |
| 14 | 785671 |
| 15 | 2177321 |
| 16 | 5581493 |
| 17 | 20632861 |
| 18 | 38770357 |
| 19 | 126491971 |
| 20 | 331160281 |
| 21 | 1070825143 |
| 22 | 1836305137 |
| 23 | 6643521067 |
| 24 | 10749957121 |
| 25 | 32951279111 |
| 26 | 86252640919 |
| 27 | 213265164691 |
| 28 | 591286712167 |
| 29 | 2126709216773 |