T(n,k)=Number of (n+1)X(n+1) 0..k arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
A187633
T(n,k)=Number of (n+1)X(n+1) 0..k arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
Terms
- a(0) =10a(1) =31a(2) =24a(3) =64a(4) =446a(5) =24a(6) =113a(7) =2924a(8) =1648a(9) =954a(10) =170a(11) =12104a(12) =14044a(13) =557382a(14) =954a(15) =255a(16) =37448a(17) =106892a(18) =31903442a(19) =672698a(20) =194008a(21) =336a(22) =98014a(23) =306320a(24) =686589106a(25) =33869160a(26) =21411605018a(27) =194008a(28) =449a(29) =221640
External references
- oeis: A187633