Number of (n+2)X(3+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.

A252300

Number of (n+2)X(3+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) =1675a(1) =1370a(2) =1677a(3) =2151a(4) =3669a(5) =5416a(6) =7492a(7) =13386a(8) =20379a(9) =28688a(10) =51938a(11) =79730a(12) =112972a(13) =205370a(14) =316178a(15) =449108a(16) =817514a(17) =1260050a(18) =1791652a(19) =3262922a(20) =5031698a(21) =7157828a(22) =13038218a(23) =20110610a(24) =28614532a(25) =52126730a(26) =80410898a(27) =114425348a(28) =208455434

External references