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 | 18 |
| 3 | 164 |
| 4 | 676 |
| 5 | 2262 |
| 6 | 5766 |
| 7 | 13064 |
| 8 | 25992 |
| 9 | 48170 |
| 10 | 82810 |
| 11 | 135852 |
| 12 | 212268 |
| 13 | 320894 |
| 14 | 468846 |
| 15 | 668432 |
| 16 | 929296 |
| 17 | 1267794 |
| 18 | 1696482 |
| 19 | 2236340 |
| 20 | 2903220 |
| 21 | 3723302 |
| 22 | 4716118 |
| 23 | 5913624 |
| 24 | 7339416 |
| 25 | 9031802 |
| 26 | 11018826 |
| 27 | 13345724 |
| 28 | 16045372 |
| 29 | 19170510 |
| 30 | 22759230 |