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 | 3 |
| 2 | 9 |
| 3 | 21 |
| 4 | 48 |
| 5 | 99 |
| 6 | 198 |
| 7 | 375 |
| 8 | 693 |
| 9 | 1236 |
| 10 | 2160 |
| 11 | 3681 |
| 12 | 6168 |
| 13 | 10140 |
| 14 | 16434 |
| 15 | 26235 |
| 16 | 41376 |
| 17 | 64449 |
| 18 | 99342 |
| 19 | 151530 |
| 20 | 229032 |
| 21 | 343068 |
| 22 | 509760 |
| 23 | 751509 |
| 24 | 1099998 |
| 25 | 1598925 |
| 26 | 2309274 |
| 27 | 3314541 |
| 28 | 4729920 |
| 29 | 6711993 |
| 30 | 9474624 |
| 31 | 13306506 |
| 32 | 18598437 |
| 33 | 25874460 |
| 34 | 35838288 |
| 35 | 49427640 |
| 36 | 67892592 |