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 | 1 |
| 1 | 5 |
| 2 | 15 |
| 3 | 21 |
| 4 | 42 |
| 5 | 126 |
| 6 | 210 |
| 7 | 330 |
| 8 | 495 |
| 9 | 715 |
| 10 | 1001 |
| 11 | 1295 |
| 12 | 5180 |
| 13 | 7252 |
| 14 | 9028 |
| 15 | 11356 |
| 16 | 14195 |
| 17 | 17535 |
| 18 | 22211 |
| 19 | 26887 |
| 20 | 45241 |
| 21 | 109871 |
| 22 | 2087549 |
| 23 | 3186259 |
| 24 | 5326355 |
| 25 | 7832875 |
| 26 | 164490375 |
| 27 | 308102375 |
| 28 | 403718875 |
| 29 | 634415375 |
| 30 | 794973005 |
| 31 | 11129622070 |
| 32 | 16694433105 |
| 33 | 22566503645 |