Number of (n+2)X(3+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 3 6 or 7.
A251786
Number of (n+2)X(3+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 3 6 or 7.
Terms
- a(0) =3072a(1) =6470a(2) =16710a(3) =44504a(4) =130202a(5) =362242a(6) =1035154a(7) =3188016a(8) =9369766a(9) =28509654a(10) =91454234a(11) =285327668a(12) =914236522a(13) =3029323780a(14) =9884604370a(15) =32777999406a(16) =110731558818a(17) =371180607532
External references
- oeis: A251786