T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.

A187624

T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.

Terms

    a(0) =10a(1) =31a(2) =24a(3) =64a(4) =446a(5) =2a(6) =113a(7) =2924a(8) =60a(9) =948a(10) =170a(11) =12104a(12) =390a(13) =324452a(14) =36a(15) =255a(16) =37448a(17) =2146a(18) =12278892a(19) =70548a(20) =190972a(21) =336a(22) =98014a(23) =5324a(24) =221177664a(25) =4232368a(26) =6090023738a(27) =3020a(28) =449a(29) =221640

External references