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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 7 |
| 9 | 8 |
| 10 | 9 |
| 11 | 11 |
| 12 | 252 |
| 13 | 6556 |
| 14 | 6776 |
| 15 | 7117 |
| 16 | 10101 |
| 17 | 12621 |
| 18 | 20202 |
| 19 | 22722 |
| 20 | 30303 |
| 21 | 1784871 |
| 22 | 1786871 |
| 23 | 1788871 |
| 24 | 1913191 |
| 25 | 1915191 |
| 26 | 1917191 |
| 27 | 1919191 |
| 28 | 1444884441 |
| 29 | 334495594433 |
| 30 | 334843348433 |
| 31 | 355110011553 |
| 32 | 355746647553 |
| 33 | 10614366341601 |
| 34 | 14102600620141 |
| 35 | 28095922959082 |
| 36 | 38072044027083 |