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 | 22 |
| 2 | 99 |
| 3 | 379 |
| 4 | 1412 |
| 5 | 5265 |
| 6 | 19758 |
| 7 | 74637 |
| 8 | 283560 |
| 9 | 1082449 |
| 10 | 4148603 |
| 11 | 15953607 |
| 12 | 61526969 |
| 13 | 237876571 |
| 14 | 921678876 |
| 15 | 3577968081 |
| 16 | 13913243136 |
| 17 | 54184698801 |
| 18 | 211307360871 |
| 19 | 825059443551 |
| 20 | 3225071709981 |
| 21 | 12619275028611 |
| 22 | 49423455006501 |
| 23 | 193732625020419 |
| 24 | 760001601263697 |
| 25 | 2983614441691035 |
| 26 | 11720995167614703 |
| 27 | 46074369462135607 |