Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column.
A251461
Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column.
Terms
- a(0) =168a(1) =738a(2) =3142a(3) =11134a(4) =38509a(5) =120982a(6) =373380a(7) =1094071a(8) =3155436a(9) =8863194a(10) =24492702a(11) =66982908a(12) =179947523a(13) =483592878a(14) =1274228592a(15) =3384152417a(16) =8795160858a(17) =23166886746a(18) =59604866106a(19) =156072942342a(20) =398500362769
External references
- oeis: A251461