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 | 1 |
| 2 | 257 |
| 3 | 10257 |
| 4 | 170257 |
| 5 | 1670882 |
| 6 | 11505378 |
| 7 | 61292514 |
| 8 | 268652514 |
| 9 | 1009853139 |
| 10 | 3352413139 |
| 11 | 10042998755 |
| 12 | 27598188771 |
| 13 | 70457539396 |
| 14 | 168802499396 |
| 15 | 382616259396 |
| 16 | 825980472132 |
| 17 | 1707628231653 |
| 18 | 3396588391653 |
| 19 | 6525595601653 |
| 20 | 12150082161653 |
| 21 | 21987344308134 |
| 22 | 38769279231910 |