n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 19 |
5 | 47 |
6 | 140 |
7 | 374 |
8 | 1082 |
9 | 2998 |
10 | 8574 |
11 | 24130 |
12 | 68876 |
13 | 195587 |
14 | 559076 |
15 | 1596651 |
16 | 4575978 |
17 | 13122219 |
18 | 37711998 |
19 | 108488765 |
20 | 312577827 |
21 | 901531937 |
22 | 2603264050 |
23 | 7524331268 |
24 | 21768850808 |
25 | 63032844756 |
26 | 182662328945 |
27 | 529722408615 |
28 | 1537261773438 |
[1,1,3,6,19,47,140,374,1082,2998,8574,24130,68876, 195587,559076,1596651,4575978,13122219,37711998, 108488765,312577827,901531937,2603264050, 7524331268,21768850808,63032844756,182662328945, 529722408615,1537261773438] |