Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.

A251943

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.

Terms

    a(0) =1462a(1) =2255a(2) =1933a(3) =2735a(4) =4346a(5) =7115a(6) =12344a(7) =20995a(8) =36057a(9) =58580a(10) =104407a(11) =186502a(12) =312212a(13) =556439a(14) =993385a(15) =1675842a(16) =2994368a(17) =5369398a(18) =9093366a(19) =16230412a(20) =29150222a(21) =49556229a(22) =88369502a(23) =158881402a(24) =271050205a(25) =482778934a(26) =868646414a(27) =1486881592

External references