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) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 77 |
| 3 | 770 |
| 4 | 7609 |
| 5 | 73178 |
| 6 | 691971 |
| 7 | 6438797 |
| 8 | 59131499 |
| 9 | 536802112 |
| 10 | 4824305213 |
| 11 | 42970458839 |
| 12 | 379692684987 |
| 13 | 3330902681785 |
| 14 | 29030038318212 |
| 15 | 251498296181846 |
| 16 | 2166886679835829 |
| 17 | 18575273870841254 |
| 18 | 158486917413708492 |
| 19 | 1346334588169264925 |
| 20 | 11390431451798171304 |