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 | 10 |
| 2 | 100 |
| 3 | 390 |
| 4 | 1521 |
| 5 | 4212 |
| 6 | 11664 |
| 7 | 26676 |
| 8 | 61009 |
| 9 | 123006 |
| 10 | 248004 |
| 11 | 456666 |
| 12 | 840889 |
| 13 | 1445192 |
| 14 | 2483776 |
| 15 | 4042440 |
| 16 | 6579225 |
| 17 | 10244610 |
| 18 | 15952036 |
| 19 | 23944030 |
| 20 | 35940025 |
| 21 | 52300380 |
| 22 | 76108176 |
| 23 | 107854812 |
| 24 | 152843769 |
| 25 | 211679286 |
| 26 | 293162884 |
| 27 | 397932402 |