# A147964 (b-file synthesized from sequence entry)
5 120
6 691020
7 128047374
8 6519340912
9 156097542888
10 2259242749800
11 22815705739244
12 175939638868224
13 1099964624581680
14 5812510584460580
15 26753072198342490
16 109684475412107232
17 407515671392921520
18 1390695205822539984
19 4406577363489470616
20 13079027432832437440