A172587 - OEIS

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A172587 as a simple table

n	a(n)
1	0
2	0
3	1
4	11732745024
5	9647422924194982967040
6	104923772318750486122754981962387200
7	11251027489082268563385494644966780470231583948800

[0,0,1,11732745024,9647422924194982967040, 104923772318750486122754981962387200, 11251027489082268563385494644966780470231583948800\ ]