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 | 10 |
| 2 | 150 |
| 3 | 1747 |
| 4 | 16782 |
| 5 | 140210 |
| 6 | 1050460 |
| 7 | 7227405 |
| 8 | 46371039 |
| 9 | 281020959 |
| 10 | 1623035066 |
| 11 | 9002891450 |
| 12 | 48234712165 |
| 13 | 250875276249 |
| 14 | 1271548675730 |
| 15 | 6302249244967 |
| 16 | 30627310088497 |
| 17 | 146302624587552 |
| 18 | 688283767932118 |
| 19 | 3194839035650041 |