A163709 Number of n X 7 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, 47, 642, 6336, 53065, 381729, 2583720, 17293440, 114715060, 743652491, 4686262619, 28839655105, 174605800641, 1045290549927, 6200698717370, 36471135066365, 212812724796527, 1232963044220635, 7099325342720830, 40658244439417426, 231741927633537849, 1315167155727973541

Offset

1,2

Links

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

Crossrefs

Row 7 of A391823.

Sequence in context: A142577 A098226 A106310 * A244880 A101793 A262120

Adjacent sequences: A163706 A163707 A163708 * A163710 A163711 A163712

Keyword

nonn

Author

R. H. Hardin, Aug 03 2009

Extensions

a(9) onward from Andrew Howroyd, Dec 23 2025

Status

approved