# A144858 (b-file synthesized from sequence entry)
1 0
2 1
3 120
4 2016
5 32640
6 130816
7 523776
8 2096128
9 8386560
10 134209536
11 536854528
12 2147450880
13 34359607296
14 549755289600
15 2199022206976
16 8796090925056
17 35184367894528
18 140737479966720
19 562949936644096
20 2251799780130816