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 | 15 |
| 2 | 51 |
| 3 | 171 |
| 4 | 512 |
| 5 | 1345 |
| 6 | 3145 |
| 7 | 6676 |
| 8 | 13091 |
| 9 | 24047 |
| 10 | 41835 |
| 11 | 69525 |
| 12 | 111126 |
| 13 | 171761 |
| 14 | 257857 |
| 15 | 377350 |
| 16 | 539905 |
| 17 | 757151 |
| 18 | 1042931 |
| 19 | 1413567 |
| 20 | 1888140 |
| 21 | 2488785 |
| 22 | 3241001 |
| 23 | 4173976 |
| 24 | 5320927 |
| 25 | 6719455 |
| 26 | 8411915 |
| 27 | 10445801 |
| 28 | 12874146 |
| 29 | 15755937 |
| 30 | 19156545 |