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 | 148 |
| 3 | 2159 |
| 4 | 16746 |
| 5 | 90371 |
| 6 | 383147 |
| 7 | 1364679 |
| 8 | 4256436 |
| 9 | 11952264 |
| 10 | 30812675 |
| 11 | 73980045 |
| 12 | 167235586 |
| 13 | 358959637 |
| 14 | 736521122 |
| 15 | 1452480779 |
| 16 | 2765433413 |
| 17 | 5102243735 |
| 18 | 9150977405 |
| 19 | 15997148389 |
| 20 | 27320179543 |
| 21 | 45672422411 |
| 22 | 74869958841 |
| 23 | 120533007335 |
| 24 | 190824424010 |
| 25 | 297447916702 |
| 26 | 456983633899 |
| 27 | 692658264469 |
| 28 | 1036670276472 |
| 29 | 1533219097805 |