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 | 3 |
| 3 | 10 |
| 4 | 64 |
| 5 | 973 |
| 6 | 31743 |
| 7 | 2069970 |
| 8 | 267270040 |
| 9 | 68629753649 |
| 10 | 35171000942707 |
| 11 | 36024807353574290 |
| 12 | 73784587576805254664 |
| 13 | 302228602363365451957805 |
| 14 | 2475873310144021668263093215 |
| 15 | 40564787336902311168400640561098 |
| 16 | 1329227697997490307154018925966130320 |