Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column.
A251462
Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column.
Terms
- a(0) =602a(1) =3142a(2) =15719a(3) =62309a(4) =239572a(5) =809934a(6) =2678350a(7) =8222849a(8) =24796090a(9) =71644353a(10) =203613185a(11) =565710173a(12) =1545775344a(13) =4185949130a(14) =11136965910a(15) =29652176113a(16) =77452013880a(17) =203909911308a(18) =525772216775
External references
- oeis: A251462