# A056418 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 0
5 6
6 150
7 400
8 4080
9 15480
10 127818
11 269340
12 3493680
13 5777190
14 57262450
15 210945182
16 1030388115
17 2493913170
18 32176448060
19 51785999300
20 562228325904
21 1805427491920
22 10438821843750
23 22865672706000