A163711 Number of n X 9 binary arrays with all 1s connected, a path of 1s from left column to lower right corner, and no 1 having more than two 1s adjacent.

1, 123, 2908, 48912, 744868, 9396562, 106818182, 1186062939, 13162407450, 144390981178, 1546806339180, 16142952405393, 164999389854156, 1663321148396446, 16616347617856410, 164803106656837468, 1623140637871420464, 15875029571436122195, 154258245282611239447

Offset

1,2

Links

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

Crossrefs

Row 9 of A391823.

Sequence in context: A202132 A160040 A297524 * A293309 A297754 A068239

Adjacent sequences: A163708 A163709 A163710 * A163712 A163713 A163714

Keyword

nonn

Author

R. H. Hardin, Aug 03 2009

Extensions

a(7) onward from Andrew Howroyd, Dec 23 2025

Status

approved