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 | 14 |
| 3 | 65 |
| 4 | 214 |
| 5 | 597 |
| 6 | 1518 |
| 7 | 3649 |
| 8 | 8462 |
| 9 | 19157 |
| 10 | 42646 |
| 11 | 93777 |
| 12 | 204294 |
| 13 | 441781 |
| 14 | 949598 |
| 15 | 2030849 |
| 16 | 4324510 |
| 17 | 9174069 |
| 18 | 19397574 |
| 19 | 40893265 |
| 20 | 85981910 |
| 21 | 180353621 |
| 22 | 377485774 |
| 23 | 788527425 |
| 24 | 1644165294 |
| 25 | 3422550037 |
| 26 | 7113537398 |
| 27 | 14763947729 |