Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 1 3 6 or 7.
A252191
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 1 3 6 or 7.
Terms
- a(0) =13044a(1) =15094a(2) =20974a(3) =34532a(4) =57284a(5) =87230a(6) =147696a(7) =246676a(8) =385720a(9) =640208a(10) =1157336a(11) =1822536a(12) =3077456a(13) =5975024a(14) =9555784a(15) =16548432a(16) =34746832a(17) =56403528a(18) =100181072a(19) =225856592a(20) =371166280a(21) =672778320a(22) =1598569552a(23) =2649299016a(24) =4867854416
External references
- oeis: A252191