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A374661 as a simple table

na(n)
01
15
235
3280
43080
546200
61016400
733541200
81710601200
9136848096000
1017379708192000
113528080762976000
121150154328730176000
13603831022583342400000
14511444876128091012800000
15699656590543228505510400000
161546940721691078225683494400000

[1,5,35,280,3080,46200,1016400,33541200,
 1710601200,136848096000,17379708192000,
 3528080762976000,1150154328730176000,
 603831022583342400000,511444876128091012800000,
 699656590543228505510400000,
 1546940721691078225683494400000]