n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 13 |
4 | 82 |
5 | 549 |
6 | 3697 |
7 | 25169 |
8 | 170608 |
9 | 1156219 |
10 | 7839519 |
11 | 53154565 |
12 | 360388169 |
13 | 2443433405 |
14 | 16566593998 |
15 | 112322259076 |
16 | 761549454562 |
17 | 5163336422278 |
18 | 35007634908875 |
19 | 237353212759913 |
20 | 1609264585122172 |
21 | 10910880368099881 |
[0,2,13,82,549,3697,25169,170608,1156219,7839519, 53154565,360388169,2443433405,16566593998, 112322259076,761549454562,5163336422278, 35007634908875,237353212759913,1609264585122172, 10910880368099881] |