n | a(n) |
---|---|
1 | 4 |
2 | 30 |
3 | 134 |
4 | 601 |
5 | 2665 |
6 | 11915 |
7 | 53134 |
8 | 237241 |
9 | 1058821 |
10 | 4726432 |
11 | 21096932 |
12 | 94170565 |
13 | 420346821 |
14 | 1876297370 |
15 | 8375198688 |
16 | 37384256688 |
17 | 166871556228 |
18 | 744862153097 |
19 | 3324830353450 |
20 | 14840996988230 |
21 | 66245542638609 |
22 | 295699266565050 |
[4,30,134,601,2665,11915,53134,237241,1058821, 4726432,21096932,94170565,420346821,1876297370, 8375198688,37384256688,166871556228,744862153097, 3324830353450,14840996988230,66245542638609, 295699266565050] |