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 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 15 |
| 6 | 36 |
| 7 | 77 |
| 8 | 184 |
| 9 | 423 |
| 10 | 1060 |
| 11 | 2585 |
| 12 | 6612 |
| 13 | 16913 |
| 14 | 44226 |
| 15 | 116115 |
| 16 | 309120 |
| 17 | 826693 |
| 18 | 2229606 |
| 19 | 6041145 |
| 20 | 16461300 |
| 21 | 45034605 |
| 22 | 123722632 |
| 23 | 341045702 |
| 24 | 943197528 |
| 25 | 2615922250 |
| 26 | 7274629700 |
| 27 | 20278767420 |
| 28 | 56656404896 |
| 29 | 158617430965 |
| 30 | 444926154060 |
| 31 | 1250255699930 |