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 | 21 |
| 3 | 171 |
| 4 | 666 |
| 5 | 1830 |
| 6 | 4095 |
| 7 | 8001 |
| 8 | 14196 |
| 9 | 23436 |
| 10 | 36585 |
| 11 | 54615 |
| 12 | 78606 |
| 13 | 109746 |
| 14 | 149331 |
| 15 | 198765 |
| 16 | 259560 |
| 17 | 333336 |
| 18 | 421821 |
| 19 | 526851 |
| 20 | 650370 |
| 21 | 794430 |
| 22 | 961191 |
| 23 | 1152921 |
| 24 | 1371996 |
| 25 | 1620900 |
| 26 | 1902225 |
| 27 | 2218671 |
| 28 | 2573046 |
| 29 | 2968266 |
| 30 | 3407355 |
| 31 | 3893445 |
| 32 | 4429776 |
| 33 | 5019696 |
| 34 | 5666661 |