Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
A251944
Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
Terms
- a(0) =2255a(1) =1182a(2) =1251a(3) =2053a(4) =3609a(5) =7348a(6) =14434a(7) =29212a(8) =60954a(9) =125586a(10) =260804a(11) =550695a(12) =1149439a(13) =2414347a(14) =5147608a(15) =10837406a(16) =22947112a(17) =49325294a(18) =104571648a(19) =222836190a(20) =482146165a(21) =1027815785a(22) =2201179969a(23) =4787010362a(24) =10247989102a(25) =22030788568
External references
- oeis: A251944