T(n,k)=Number of (n+1)X(n+1) 0..k arrays with the array of 2X2 subblock determinants symmetric.

A187457

T(n,k)=Number of (n+1)X(n+1) 0..k arrays with the array of 2X2 subblock determinants symmetric.

Terms

    a(0) =16a(1) =81a(2) =264a(3) =256a(4) =5175a(5) =10776a(6) =625a(7) =38464a(8) =1293651a(9) =1011136a(10) =1296a(11) =187525a(12) =34166592a(13) =983320335a(14) =229028648a(15) =2401a(16) =628992a(17) =450657775a(18) =99952737952a(20) =121525356464a(21) =4096a(22) =1938979a(23) =3553508880

External references