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 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 17 |
| 7 | 38 |
| 8 | 88 |
| 9 | 208 |
| 10 | 497 |
| 11 | 1194 |
| 12 | 2877 |
| 13 | 6948 |
| 14 | 16821 |
| 15 | 40846 |
| 16 | 99539 |
| 17 | 243536 |
| 18 | 598353 |
| 19 | 1476370 |
| 20 | 3657883 |
| 21 | 9098420 |
| 22 | 22713077 |
| 23 | 56887062 |
| 24 | 142897576 |
| 25 | 359879600 |
| 26 | 908373713 |
| 27 | 2297266554 |
| 28 | 5819357841 |
| 29 | 14762051140 |
| 30 | 37491373173 |
| 31 | 95311970590 |