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n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 9 |
4 | 44 |
5 | 127 |
6 | 619 |
7 | 1989 |
8 | 9856 |
9 | 33919 |
10 | 168677 |
11 | 607001 |
12 | 3024616 |
13 | 11240063 |
14 | 56097646 |
15 | 213651441 |
16 | 1066929850 |
17 | 4142201763 |
18 | 20695048729 |
19 | 81607888787 |
20 | 407840022294 |
21 | 1629154166409 |
22 | 8143064177452 |
23 | 32884145423379 |
24 | 164385396321806 |
25 | 670058403611511 |
26 | 3349805478222521 |
27 | 13765134471463579 |
[1,1,4,9,44,127,619,1989,9856,33919,168677,607001, 3024616,11240063,56097646,213651441,1066929850, 4142201763,20695048729,81607888787,407840022294, 1629154166409,8143064177452,32884145423379, 164385396321806,670058403611511,3349805478222521, 13765134471463579] |