T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 subblock off diagonal and antidiagonal nonsingular and the array of 2X2 subblock determinants antisymmetric about the diagonal and antidiagonal.
A187705
T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 subblock off diagonal and antidiagonal nonsingular and the array of 2X2 subblock determinants antisymmetric about the diagonal and antidiagonal.
Terms
- a(0) =10a(1) =31a(2) =128a(3) =64a(4) =1489a(5) =2a(6) =113a(7) =8272a(8) =72a(9) =34a(10) =170a(11) =31461a(12) =322a(13) =5030a(14) =0a(15) =255a(16) =93476a(17) =1718a(18) =81456a(19) =36a(20) =2a(21) =336a(22) =235773a(23) =2904a(24) =875696a(25) =530a(26) =7410a(27) =0a(28) =449a(29) =524284
External references
- oeis: A187705