Product of remainders of n mod k, for k = 2,3,4,...,n-1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =2a(5) =0a(6) =6a(7) =0a(8) =0a(9) =0a(10) =720a(11) =0a(12) =2160a(13) =0a(14) =0a(15) =0a(16) =2419200a(17) =0a(18) =65318400a(19) =0a(20) =0a(21) =0a(22) =754427520000a(23) =0a(24) =0a(25) =0a(26) =0a(27) =0a(29) =0a(31) =0