Number of (7+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

A253847

Number of (7+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Terms

    a(0) =709704a(1) =517697a(2) =233370a(3) =196053a(4) =168884a(5) =225776a(6) =262418a(7) =401447a(8) =624346a(9) =1006728a(10) =1715988a(11) =3110616a(12) =5795860a(13) =11003191a(14) =20882622a(15) =39347462a(16) =73051514a(17) =133035730a(18) =237221478a(19) =414433723a(20) =709529666a(21) =1191477039a(22) =1964567208a(23) =3184664743

External references