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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 3 |
| 6 | 5 |
| 7 | 10 |
| 8 | 14 |
| 9 | 25 |
| 10 | 44 |
| 11 | 71 |
| 12 | 128 |
| 13 | 231 |
| 14 | 411 |
| 15 | 740 |
| 16 | 1352 |
| 17 | 2481 |
| 18 | 4570 |
| 19 | 8390 |
| 20 | 15550 |
| 21 | 29103 |
| 22 | 54345 |
| 23 | 101312 |
| 24 | 190316 |
| 25 | 359827 |
| 26 | 679051 |
| 27 | 1279956 |
| 28 | 2426200 |
| 29 | 4621174 |
| 30 | 8789565 |
| 31 | 16701225 |
| 32 | 31871629 |
| 33 | 61052515 |
| 34 | 116818123 |
| 35 | 223333533 |
| 36 | 428435056 |
| 37 | 824395640 |
| 38 | 1584833707 |
| 39 | 3044562148 |
| 40 | 5865073390 |
| 41 | 11326741619 |
| 42 | 21857561924 |