Number of non-normal (0,1) semi-magic squares with sum of entries equal to n.
A321720
Number of non-normal (0,1) semi-magic squares with sum of entries equal to n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =25a(5) =120a(6) =726a(7) =5040a(8) =40410a(9) =362881a(10) =3630840a(11) =39916800a(12) =479069574a(13) =6227020800a(14) =87181402140
External references
- oeis: A321720