Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.

A252527

Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.

Terms

    a(0) =621a(1) =341a(2) =466a(3) =610a(4) =1114a(5) =1748a(6) =2332a(7) =4244a(8) =6760a(9) =9112a(10) =16552a(11) =26576a(12) =36016a(13) =65360a(14) =105376a(15) =143200a(16) =259744a(17) =419648a(18) =571072a(19) =1035584a(20) =1674880a(21) =2280832a(22) =4135552a(23) =6692096a(24) =9116416a(25) =16528640a(26) =26753536a(27) =36451840a(28) =66087424a(29) =106984448

External references