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

A252185

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

Terms

    a(0) =945a(1) =1440a(2) =2055a(3) =3341a(4) =5300a(5) =7973a(6) =13044a(7) =21238a(8) =32234a(9) =53032a(10) =87440a(11) =133042a(12) =218874a(13) =363938a(14) =553312a(15) =908558a(16) =1520436a(17) =2306990a(18) =3778274a(19) =6356426a(20) =9620954a(21) =15713012a(22) =26556444a(23) =40091976a(24) =65299770a(25) =110813364a(26) =166873308a(27) =271087620

External references