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 | 17 |
| 3 | 232 |
| 4 | 540 |
| 5 | 2520 |
| 6 | 27702 |
| 7 | 59869 |
| 8 | 82657 |
| 9 | 2947885 |
| 10 | 5851737 |
| 11 | 37568808 |
| 12 | 297970002 |
| 13 | 478867545 |
| 14 | 5721476626 |
| 15 | 29961646177 |
| 16 | 65107456694 |
| 17 | 570931518444 |
| 18 | 2997997000002 |
| 19 | 9607464857096 |
| 20 | 53858918990529 |
| 21 | 299956723113202 |
| 22 | 1253472906066265 |
| 23 | 2171966135005184 |