# A002634 (b-file synthesized from sequence entry)
3 -2
4 3
5 0
6 25
7 152
8 1350
9 12644
10 131391
11 1489568
12 18329481
13 243365514
14 3468969962
15 52848096274
16 857073295427
17 14744289690560
18 268202790690465
19 5143861702523924
20 103746422699053582
21 2195275169113687656
22 48629604864202585247