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 | 6 |
| 3 | 11 |
| 4 | 20 |
| 5 | 35 |
| 6 | 60 |
| 7 | 103 |
| 8 | 178 |
| 9 | 307 |
| 10 | 528 |
| 11 | 909 |
| 12 | 1566 |
| 13 | 2697 |
| 14 | 4644 |
| 15 | 7997 |
| 16 | 13772 |
| 17 | 23717 |
| 18 | 40842 |
| 19 | 70333 |
| 20 | 121120 |
| 21 | 208579 |
| 22 | 359190 |
| 23 | 618555 |
| 24 | 1065204 |
| 25 | 1834371 |
| 26 | 3158940 |
| 27 | 5439959 |
| 28 | 9368066 |
| 29 | 16132595 |
| 30 | 27781680 |
| 31 | 47842381 |
| 32 | 82388590 |
| 33 | 141880057 |
| 34 | 244329348 |
| 35 | 420755613 |
| 36 | 724576428 |
| 37 | 1247781333 |
| 38 | 2148784026 |
| 39 | 3700386173 |
| 40 | 6372375104 |