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A156073 as a simple table

na(n)
-11
02
15
220
3130
41120
512080
6156320
72360080
840721920
9790465280
1017048837120
11404482209280
1210468697374720
13293526944276480
148863147657809920
15286741939970836480
169895168120066539520
17362814031120908615680
1814085379571459949854720
19577210378447729271111680

[1,2,5,20,130,1120,12080,156320,2360080,40721920,
 790465280,17048837120,404482209280,10468697374720,
 293526944276480,8863147657809920,
 286741939970836480,9895168120066539520,
 362814031120908615680,14085379571459949854720,
 577210378447729271111680]