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 | 7 |
| 2 | 49 |
| 3 | 343 |
| 4 | 2395 |
| 5 | 16681 |
| 6 | 115902 |
| 7 | 803434 |
| 8 | 5556909 |
| 9 | 38350583 |
| 10 | 264117327 |
| 11 | 1815254345 |
| 12 | 12451509292 |
| 13 | 85246693192 |
| 14 | 582545874403 |
| 15 | 3973788262533 |
| 16 | 27059842131395 |
| 17 | 183956317982661 |
| 18 | 1248518868323747 |
| 19 | 8460336000063413 |
| 20 | 57241697970038501 |