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) |
|---|---|
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 10 |
| 6 | 19 |
| 7 | 35 |
| 8 | 65 |
| 9 | 117 |
| 10 | 211 |
| 11 | 374 |
| 12 | 661 |
| 13 | 1157 |
| 14 | 2017 |
| 15 | 3495 |
| 16 | 6033 |
| 17 | 10370 |
| 18 | 17767 |
| 19 | 30343 |
| 20 | 51681 |
| 21 | 87801 |
| 22 | 148831 |
| 23 | 251758 |
| 24 | 425065 |
| 25 | 716425 |
| 26 | 1205569 |
| 27 | 2025675 |
| 28 | 3399005 |
| 29 | 5696122 |
| 30 | 9534331 |
| 31 | 15941099 |
| 32 | 26625281 |
| 33 | 44426877 |
| 34 | 74062507 |
| 35 | 123360230 |
| 36 | 205303933 |
| 37 | 341416205 |
| 38 | 567353377 |
| 39 | 942154863 |
| 40 | 1563526761 |