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 | 62 |
| 2 | 726 |
| 3 | 15620 |
| 4 | 117642 |
| 5 | 1771550 |
| 6 | 4826796 |
| 7 | 24137552 |
| 8 | 47045862 |
| 9 | 148035866 |
| 10 | 594823292 |
| 11 | 887503650 |
| 12 | 2565726372 |
| 13 | 4750104200 |
| 14 | 6321363006 |
| 15 | 10779215282 |
| 16 | 22164361076 |
| 17 | 42180533582 |
| 18 | 51520374300 |
| 19 | 90458382102 |
| 20 | 128100283850 |