n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 31 |
4 | 143 |
5 | 592 |
6 | 2698 |
7 | 12137 |
8 | 55724 |
9 | 258672 |
10 | 1206963 |
11 | 5675883 |
12 | 26848465 |
13 | 127379555 |
14 | 607671354 |
15 | 2905444843 |
16 | 13938687704 |
17 | 67042101669 |
18 | 323124345956 |
19 | 1560836312434 |
20 | 7552502276302 |
21 | 36604439669343 |
22 | 177681390928731 |
23 | 863603611066566 |
24 | 4202731264776623 |
25 | 20475730877063532 |
26 | 99860486183124377 |
[1,2,9,31,143,592,2698,12137,55724,258672,1206963, 5675883,26848465,127379555,607671354,2905444843, 13938687704,67042101669,323124345956, 1560836312434,7552502276302,36604439669343, 177681390928731,863603611066566,4202731264776623, 20475730877063532,99860486183124377] |