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 | 51 |
| 2 | 2601 |
| 3 | 132651 |
| 4 | 4705642 |
| 5 | 163879101 |
| 6 | 4977655636 |
| 7 | 143643342651 |
| 8 | 3885150758271 |
| 9 | 100631663710208 |
| 10 | 2504347486850059 |
| 11 | 60346174969864276 |
| 12 | 1413700229500172653 |
| 13 | 32327674542336206829 |
| 14 | 723763598518295169155 |
| 15 | 15905358480144812745511 |