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A163029 Number of nX3 binary arrays with all 1s connected and a path of 1s from top row to bottom row 1
6, 28, 144, 730, 3692, 18666, 94384, 477264, 2413346, 12203374, 61707810, 312032874, 1577831334, 7978491800, 40344192708, 204005208738, 1031576601204, 5216289773894, 26376789637884, 133377373911160, 674438554337506 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n=1..100

FORMULA

Empirical: a(n)= 7*a(n-1) -11*a(n-2) +6*a(n-3) +a(n-4) -7*a(n-5) +a(n-6). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 11 2009]

CROSSREFS

Sequence in context: A074247 A053783 A110047 * A045722 A047129 A173081

Adjacent sequences:  A163026 A163027 A163028 * A163030 A163031 A163032

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Jul 20 2009

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Last modified February 17 13:28 EST 2012. Contains 206031 sequences.