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) |
|---|---|
| 8 | 1 |
| 9 | 3 |
| 10 | 14 |
| 11 | 42 |
| 12 | 128 |
| 13 | 334 |
| 14 | 850 |
| 15 | 2010 |
| 16 | 4625 |
| 17 | 10201 |
| 18 | 21990 |
| 19 | 46108 |
| 20 | 94912 |
| 21 | 191562 |
| 22 | 380933 |
| 23 | 746338 |
| 24 | 1444676 |
| 25 | 2763931 |
| 26 | 5235309 |
| 27 | 9822686 |
| 28 | 18275648 |
| 29 | 33734658 |
| 30 | 61826344 |
| 31 | 112550305 |
| 32 | 203627610 |
| 33 | 366267931 |
| 34 | 655261559 |
| 35 | 1166312530 |
| 36 | 2066048261 |
| 37 | 3643352362 |
| 38 | 6397485909 |
| 39 | 11188129665 |
| 40 | 19491131627 |
| 41 | 33831897511 |
| 42 | 58519577756 |
| 43 | 100885389220 |
| 44 | 173368983090 |
| 45 | 297021470421 |
| 46 | 507378371670 |
| 47 | 864277569606 |
| 48 | 1468245046383 |
| 49 | 2487774321958 |
| 50 | 4204663810414 |
| 51 | 7089200255686 |
| 52 | 11924621337321 |
| 53 | 20012746962064 |
| 54 | 33513139512868 |
| 55 | 56001473574091 |
| 56 | 93387290773141 |
| 57 | 155419866337746 |