398829619domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (n+2)X4 0..3 arrays with each 3X3 subblock having a positive determinant.at n=1A184647T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock having a positive determinant.at n=4A184649Prime numbersat n=21277021