A163728 Number of n X 7 binary arrays with all 1s connected, a path of 1s from left column to right column, and no 1 having more than two 1s adjacent.

1, 68, 1080, 12865, 132342, 1122855, 8379953, 58959694, 402913422, 2682337149, 17357381870, 109372478329, 674625616524, 4095273424709, 24555257751804, 145714054983173, 856773697499716, 4996719807042721, 28933708798928724, 166506014688394349, 953003080448185465

Offset

1,2

Links

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

Crossrefs

Row 7 of A391822.

Sequence in context: A281049 A264316 A251939 * A168179 A283575 A231060

Adjacent sequences: A163725 A163726 A163727 * A163729 A163730 A163731

Keyword

nonn

Author

R. H. Hardin, Aug 03 2009

Extensions

a(8) onward from Andrew Howroyd, Dec 22 2025

Status

approved