Number of (n+2)X(1+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.

A252298

Number of (n+2)X(1+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) =864a(1) =1048a(2) =1303a(3) =1763a(4) =2587a(5) =3681a(6) =5496a(7) =8599a(8) =12992a(9) =19992a(10) =32104a(11) =49834a(12) =77450a(13) =125807a(14) =198246a(15) =311080a(16) =507571a(17) =807690a(18) =1272428a(19) =2078175a(20) =3328832a(21) =5253424a(22) =8575692a(23) =13798837a(24) =21794113a(25) =35531999a(26) =57366057a(27) =90629146a(28) =147512524

External references