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 | 5 |
| 5 | 12 |
| 6 | 30 |
| 7 | 79 |
| 8 | 227 |
| 9 | 710 |
| 10 | 2322 |
| 11 | 8071 |
| 12 | 29503 |
| 13 | 112822 |
| 14 | 450141 |
| 15 | 1867871 |
| 16 | 8037472 |
| 17 | 35787667 |
| 18 | 164551477 |
| 19 | 779945969 |
| 20 | 3804967442 |
| 21 | 19079312775 |
| 22 | 98211456209 |
| 23 | 518397621443 |
| 24 | 2802993986619 |
| 25 | 15510781288250 |
| 26 | 87765472487659 |
| 27 | 507395402140211 |
| 28 | 2994893000122118 |
| 29 | 18035546081743772 |
| 30 | 110741792670074054 |
| 31 | 692894304050453139 |