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 | 256 |
| 2 | 10000 |
| 3 | 112436 |
| 4 | 772683 |
| 5 | 4002738 |
| 6 | 16861106 |
| 7 | 60614473 |
| 8 | 192152734 |
| 9 | 549805730 |
| 10 | 1444560196 |
| 11 | 3531148666 |
| 12 | 8113219067 |
| 13 | 17664791690 |
| 14 | 36688857572 |
| 15 | 73086084181 |
| 16 | 140275448000 |
| 17 | 260397984212 |
| 18 | 469049039484 |
| 19 | 822128311864 |
| 20 | 1405576043323 |