Number of (n+2)X(3+2) 0..4 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
A252035
Number of (n+2)X(3+2) 0..4 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
Terms
- a(0) =53776a(1) =84953a(2) =43475a(3) =85570a(4) =309509a(5) =1083611a(6) =2760880a(7) =11408435a(8) =45212106a(9) =116642072a(10) =531761898a(11) =2259000889a(12) =5831023888a(13) =28257830105a(14) =124970572069a(15) =322460681029
External references
- oeis: A252035