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 | 6 |
| 3 | 12 |
| 4 | 6 |
| 5 | 30 |
| 6 | 30 |
| 7 | 56 |
| 8 | 110 |
| 9 | 156 |
| 10 | 306 |
| 11 | 506 |
| 12 | 870 |
| 13 | 1560 |
| 14 | 2652 |
| 15 | 4692 |
| 16 | 8190 |
| 17 | 14280 |
| 18 | 25122 |
| 19 | 43890 |
| 20 | 77006 |
| 21 | 135056 |
| 22 | 236682 |
| 23 | 415380 |
| 24 | 728462 |
| 25 | 1278030 |
| 26 | 2242506 |
| 27 | 3934272 |
| 28 | 6903756 |
| 29 | 12113880 |
| 30 | 21256710 |
| 31 | 37301556 |
| 32 | 65456190 |
| 33 | 114864806 |
| 34 | 201569006 |
| 35 | 353722056 |
| 36 | 620732310 |