Number of (n+2) X (1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 0 2 4 5 7 or 9.

A251645

Number of (n+2) X (1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 0 2 4 5 7 or 9.

Terms

    a(0) =376a(1) =448a(2) =738a(3) =1248a(4) =2382a(5) =4140a(6) =6978a(7) =13532a(8) =23574a(9) =39904a(10) =78046a(11) =136408a(12) =231290a(13) =455168a(14) =797254a(15) =1353500a(16) =2675622a(17) =4693960a(18) =7976098a(19) =15819328a(20) =27784502a(21) =47242988a(22) =93923158a(23) =165100664a(24) =280858818a(25) =559333552a(26) =983799526a(27) =1674143116a(28) =3338187110a(29) =5873973224

External references