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) |
|---|---|
| 0 | 0 |
| 1 | 8 |
| 2 | 44 |
| 3 | 164 |
| 4 | 494 |
| 5 | 1286 |
| 6 | 3002 |
| 7 | 6434 |
| 8 | 12869 |
| 9 | 24309 |
| 10 | 43757 |
| 11 | 75581 |
| 12 | 125969 |
| 13 | 203489 |
| 14 | 319769 |
| 15 | 490313 |
| 16 | 735470 |
| 17 | 1081574 |
| 18 | 1562274 |
| 19 | 2220074 |
| 20 | 3108104 |
| 21 | 4292144 |
| 22 | 5852924 |
| 23 | 7888724 |
| 24 | 10518299 |
| 25 | 13884155 |
| 26 | 18156203 |
| 27 | 23535819 |
| 28 | 30260339 |
| 29 | 38608019 |
| 30 | 48903491 |