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 | 0 |
| 2 | 10 |
| 3 | 274 |
| 4 | 2172 |
| 5 | 9982 |
| 6 | 33380 |
| 7 | 90684 |
| 8 | 212812 |
| 9 | 447962 |
| 10 | 867012 |
| 11 | 1569640 |
| 12 | 2691164 |
| 13 | 4410102 |
| 14 | 6956452 |
| 15 | 10620692 |
| 16 | 15763500 |
| 17 | 22826194 |
| 18 | 32341892 |
| 19 | 44947392 |
| 20 | 61395772 |
| 21 | 82569710 |
| 22 | 109495524 |
| 23 | 143357932 |
| 24 | 185515532 |
| 25 | 237517002 |
| 26 | 301118020 |
| 27 | 378298904 |