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 | 7 |
| 3 | 23 |
| 4 | 66 |
| 5 | 207 |
| 6 | 654 |
| 7 | 2049 |
| 8 | 6422 |
| 9 | 20119 |
| 10 | 63033 |
| 11 | 197551 |
| 12 | 619096 |
| 13 | 1940007 |
| 14 | 6079365 |
| 15 | 19051015 |
| 16 | 59700283 |
| 17 | 187082905 |
| 18 | 586262278 |
| 19 | 1837172149 |
| 20 | 5757153010 |
| 21 | 18041210871 |
| 22 | 56535805498 |
| 23 | 177166451873 |
| 24 | 555187134041 |
| 25 | 1739791875173 |
| 26 | 5451991915452 |