a(n) = Sum_{i=1..n} (Product_{j=1..n} M(j, ((i+j-2) mod n)+1) - Product_{j=1..n} M(j, ((i-j-1) mod n)+1)) where M is the n X n matrix with numbers 1, 2, ..., n^2 in order across rows.
A389261
a(n) = Sum_{i=1..n} (Product_{j=1..n} M(j, ((i+j-2) mod n)+1) - Product_{j=1..n} M(j, ((i-j-1) mod n)+1)) where M is the n X n matrix with numbers 1, 2, ..., n^2 in order across rows.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =-3456a(7) =-1680700a(8) =-656015360a(9) =-257682513924
External references
- oeis: A389261