login

A123071 as a simple table

na(n)
01
12
24
312
436
5120
6400
71520
85776
923712
1097344
11431808
121915456
139012608
1442406144
15210988800
161049760000
175475340800
1828558296064
19155672726528
20848579961856
214810614454272
2227271456395264
23160376430784512
24943132599095296
255735299537018880

[1,2,4,12,36,120,400,1520,5776,23712,97344,431808,
 1915456,9012608,42406144,210988800,1049760000,
 5475340800,28558296064,155672726528,848579961856,
 4810614454272,27271456395264,160376430784512,
 943132599095296,5735299537018880]