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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 12 |
| 5 | 28 |
| 6 | 48 |
| 7 | 113 |
| 8 | 195 |
| 9 | 461 |
| 10 | 798 |
| 11 | 1888 |
| 12 | 3270 |
| 13 | 7736 |
| 14 | 13399 |
| 15 | 31702 |
| 16 | 54909 |
| 17 | 129916 |
| 18 | 225021 |
| 19 | 532405 |
| 20 | 922152 |
| 21 | 2181835 |
| 22 | 3779049 |
| 23 | 8941325 |
| 24 | 15486829 |
| 25 | 36642230 |
| 26 | 63466204 |
| 27 | 150162650 |
| 28 | 260089339 |
| 29 | 615377983 |
| 30 | 1065865932 |