Irregular triangle read by rows where T(n,k) is the number of d X d non-normal semi-magic squares with d = A027750(n,k) and sum of all entries equal to n.
A321725
Irregular triangle read by rows where T(n,k) is the number of d X d non-normal semi-magic squares with d = A027750(n,k) and sum of all entries equal to n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =6a(5) =1a(6) =3a(7) =24a(8) =1a(9) =120a(10) =1a(11) =4a(12) =21a(13) =720a(14) =1a(15) =5040a(16) =1a(17) =5a(18) =282a(19) =40320a(20) =1a(21) =55a(22) =362880a(23) =1a(24) =6a(25) =6210a(26) =3628800a(27) =1a(28) =39916800a(29) =1
External references
- oeis: A321725