n | a(n) |
---|---|
1 | 4 |
2 | 50 |
3 | 398 |
4 | 3018 |
5 | 23436 |
6 | 182430 |
7 | 1417772 |
8 | 11017196 |
9 | 85621362 |
10 | 665418194 |
11 | 5171353118 |
12 | 40189602848 |
13 | 312336995590 |
14 | 2427354106352 |
15 | 18864392868124 |
16 | 146606264807250 |
17 | 1139363300400646 |
18 | 8854660691296250 |
19 | 68814763405175276 |
[4,50,398,3018,23436,182430,1417772,11017196, 85621362,665418194,5171353118,40189602848, 312336995590,2427354106352,18864392868124, 146606264807250,1139363300400646,8854660691296250, 68814763405175276] |