A163692 Number of n X 9 binary arrays with all 1s connected, a path of 1s from upper left corner to lower right corner, and no 1 having more than two 1s adjacent.

1, 85, 1732, 24449, 302869, 3195383, 32564048, 343317920, 3719895992, 40028350367, 419546774288, 4282437129413, 42960254939290, 427171923528622, 4226482864239235, 41615374225946269, 407361683332429985, 3962506201194433380, 38320575881384483186, 368773162444544815984

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..200

Crossrefs

Row 9 of A391818.

Sequence in context: A212474 A020310 A387876 * A221339 A262062 A220736

Adjacent sequences: A163689 A163690 A163691 * A163693 A163694 A163695

Keyword

nonn

Author

R. H. Hardin, Aug 03 2009

Extensions

a(7) onward from Andrew Howroyd, Dec 24 2025

Status

approved