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) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 50 |
| 3 | 276 |
| 4 | 1498 |
| 5 | 8352 |
| 6 | 46730 |
| 7 | 260204 |
| 8 | 1447890 |
| 9 | 8062968 |
| 10 | 44907298 |
| 11 | 250082756 |
| 12 | 1392637914 |
| 13 | 7755351712 |
| 14 | 43188407610 |
| 15 | 240509081468 |
| 16 | 1339353796226 |
| 17 | 7458635202952 |
| 18 | 41535888495186 |
| 19 | 231306378487028 |
| 20 | 1288106280145770 |
| 21 | 7173247100732400 |
| 22 | 39946606186601514 |