Number of (5+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.

A252310

Number of (5+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.

Terms

    a(0) =2587a(1) =2350a(2) =3669a(3) =5117a(4) =9368a(5) =15444a(6) =22521a(7) =43870a(8) =72344a(9) =109721a(10) =229454a(11) =377280a(12) =602057a(13) =1358574a(14) =2223120a(15) =3723881a(16) =8973230a(17) =14621424a(18) =25440425a(19) =64229166a(20) =104350128a(21) =186159401a(22) =483655214a(23) =784380720a(24) =1419895337a(25) =3748625454

External references