# A006214 (b-file synthesized from sequence entry)
0 0
1 5
2 32
3 178
4 1024
5 6320
6 42272
7 306448
8 2401024
9 20253440
10 183194912
11 1769901568
12 18198049024
13 198465167360
14 2288729963552
15 27831596812288
16 355961301697024
17 4777174607790080
18 67129052143388192
19 985743987073220608
20 15098811288386497024
21 240833888369219993600