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) |
|---|---|
| 5 | 1 |
| 6 | 1 |
| 7 | 4 |
| 8 | 14 |
| 9 | 46 |
| 10 | 145 |
| 11 | 440 |
| 12 | 1315 |
| 13 | 3877 |
| 14 | 11315 |
| 15 | 32792 |
| 16 | 94529 |
| 17 | 271510 |
| 18 | 777764 |
| 19 | 2223865 |
| 20 | 6350657 |
| 21 | 18120730 |
| 22 | 51680249 |
| 23 | 147359335 |
| 24 | 420163711 |
| 25 | 1198151432 |
| 26 | 3417475326 |
| 27 | 9750708533 |
| 28 | 27831153091 |
| 29 | 79471338455 |
| 30 | 227032777454 |
| 31 | 648896436944 |
| 32 | 1855571389651 |
| 33 | 5308837191604 |