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 | 9 |
| 2 | 42 |
| 3 | 140 |
| 4 | 378 |
| 5 | 882 |
| 6 | 1848 |
| 7 | 3564 |
| 8 | 6435 |
| 9 | 11011 |
| 10 | 18018 |
| 11 | 28392 |
| 12 | 43316 |
| 13 | 64260 |
| 14 | 93024 |
| 15 | 131784 |
| 16 | 183141 |
| 17 | 250173 |
| 18 | 336490 |
| 19 | 446292 |
| 20 | 584430 |
| 21 | 756470 |
| 22 | 968760 |
| 23 | 1228500 |
| 24 | 1543815 |
| 25 | 1923831 |
| 26 | 2378754 |
| 27 | 2919952 |
| 28 | 3560040 |
| 29 | 4312968 |
| 30 | 5194112 |
| 31 | 6220368 |
| 32 | 7410249 |
| 33 | 8783985 |
| 34 | 10363626 |