Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
A251844
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
Terms
- a(0) =2784a(1) =9647a(2) =40492a(3) =100973a(4) =616922a(5) =2726048a(6) =6811452a(7) =41181626a(8) =182794163a(9) =457065675a(10) =2755684055a(11) =12239107983a(12) =30610006209a(13) =184445367947a(14) =819388421574
External references
- oeis: A251844