A163719 Number of n X 7 binary arrays with all 1s connected, a path of 1s from top row to bottom row, and no 1 having more than two 1s adjacent.

28, 351, 2854, 23330, 184346, 1284906, 8379953, 53954221, 346203486, 2192715470, 13620727880, 83069456676, 499681174860, 2976205750556, 17586429347339, 103156300975315, 600859061046064, 3477435935584190, 20010920872881322, 114572779378601116, 653015095637701516

Offset

1,1

Links

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

Crossrefs

Column 7 of A391822.

Sequence in context: A272174 A173421 A085744 * A138452 A276286 A125440

Adjacent sequences: A163716 A163717 A163718 * A163720 A163721 A163722

Keyword

nonn

Author

R. H. Hardin, Aug 03 2009

Extensions

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

Status

approved