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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 16 |
| 6 | 27 |
| 7 | 66 |
| 8 | 109 |
| 9 | 279 |
| 10 | 469 |
| 11 | 1201 |
| 12 | 2119 |
| 13 | 5242 |
| 14 | 9607 |
| 15 | 23133 |
| 16 | 43727 |
| 17 | 103015 |
| 18 | 199819 |
| 19 | 462269 |
| 20 | 916631 |
| 21 | 2132121 |
| 22 | 4220267 |
| 23 | 10010203 |
| 24 | 19497608 |
| 25 | 47042042 |
| 26 | 90370622 |
| 27 | 221337726 |
| 28 | 420136173 |
| 29 | 1042837195 |
| 30 | 1958787580 |