# A321045 (b-file synthesized from sequence entry)
0 1
1 1
2 30
3 468
4 7560
5 121824
6 1963440
7 31644432
8 510008400
9 8219725776
10 132476037840
11 2135095631568
12 34411003154640
13 554596768687824
14 8938349587100880
15 144057985642894032
16 2321760077211226320
17 37419444899740487376
18 603083354885909384400
19 9719800331483969538768