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 | 35 |
| 2 | 1225 |
| 3 | 9723 |
| 4 | 62530 |
| 5 | 343310 |
| 6 | 1413961 |
| 7 | 5715255 |
| 8 | 20090516 |
| 9 | 67370124 |
| 10 | 216796950 |
| 11 | 667696708 |
| 12 | 2029712814 |
| 13 | 6055036914 |
| 14 | 17929790545 |
| 15 | 52996398729 |
| 16 | 156389908011 |
| 17 | 463168251873 |
| 18 | 1376399848038 |
| 19 | 4108298709116 |
| 20 | 12322769960737 |
| 21 | 37117215785687 |