Number of (n+2)X(2+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime.
A251813
Number of (n+2)X(2+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime.
Terms
- a(0) =500a(1) =538a(2) =771a(3) =1511a(4) =3501a(5) =9040a(6) =24411a(7) =66516a(8) =182350a(9) =501847a(10) =1381865a(11) =3805521a(12) =10483208a(13) =28880671a(14) =79563282a(15) =219191950a(16) =603867313a(17) =1663633281a(18) =4583249193a(19) =12626700608a(20) =34786146677a(21) =95834675528a(22) =264021359180a(23) =727370137909
External references
- oeis: A251813