# A085340 (b-file synthesized from sequence entry)
1 -1
2 1
3 4
4 41
5 528
6 8177
7 148160
8 3077713
9 72147712
10 1884629825
11 54294967296
12 1710428956601
13 58496602689536
14 2158563109641265
15 85487558566199296
16 3616912482448035233
17 162819625954342010880
18 7770488166051562690817
19 391896604540625999888384