n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 18 |
3 | 94 |
4 | 582 |
5 | 4294 |
6 | 37398 |
7 | 378214 |
8 | 4366422 |
9 | 56697574 |
10 | 817979478 |
11 | 12981058534 |
12 | 224732536662 |
13 | 4214866778854 |
14 | 85130743747158 |
15 | 1842265527790054 |
16 | 42525237455785302 |
17 | 1042966136232956134 |
18 | 27084277306054500438 |
19 | 742412698554626764774 |
20 | 21421502369955072576342 |
21 | 648998599988032588957414 |
[1,4,18,94,582,4294,37398,378214,4366422,56697574, 817979478,12981058534,224732536662,4214866778854, 85130743747158,1842265527790054,42525237455785302, 1042966136232956134,27084277306054500438, 742412698554626764774,21421502369955072576342, 648998599988032588957414] |