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 | 31 |
| 3 | 1204 |
| 4 | 1347 |
| 5 | 1504 |
| 6 | 8151 |
| 7 | 8980 |
| 8 | 9891 |
| 9 | 48600 |
| 10 | 53431 |
| 11 | 58740 |
| 12 | 284347 |
| 13 | 312504 |
| 14 | 343447 |
| 15 | 1658380 |
| 16 | 1822491 |
| 17 | 2002840 |
| 18 | 9666831 |
| 19 | 10623340 |
| 20 | 11674491 |
| 21 | 56343504 |
| 22 | 61918447 |
| 23 | 68045004 |
| 24 | 328395091 |
| 25 | 360888240 |
| 26 | 396596431 |
| 27 | 1914027940 |
| 28 | 2103411891 |
| 29 | 2311534480 |
| 30 | 11155773447 |