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 | 6 |
| 1 | 43 |
| 2 | 176 |
| 3 | 540 |
| 4 | 1380 |
| 5 | 3102 |
| 6 | 6336 |
| 7 | 12012 |
| 8 | 21450 |
| 9 | 36465 |
| 10 | 59488 |
| 11 | 93704 |
| 12 | 143208 |
| 13 | 213180 |
| 14 | 310080 |
| 15 | 441864 |
| 16 | 618222 |
| 17 | 850839 |
| 18 | 1153680 |
| 19 | 1543300 |
| 20 | 2039180 |
| 21 | 2664090 |
| 22 | 3444480 |
| 23 | 4410900 |
| 24 | 5598450 |
| 25 | 7047261 |
| 26 | 8803008 |
| 27 | 10917456 |
| 28 | 13449040 |
| 29 | 16463480 |