# A111599 (b-file synthesized from sequence entry)
9 1
10 90
11 4950
12 217800
13 8494200
14 309188880
15 10821610800
16 371026656000
17 12614906304000
18 428906814336000
19 14668613050291200
20 506733905373696000
21 17735686688079360000
22 630299019222512640000
23 22780807409042242560000