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A163035 Number of nX9 binary arrays with all 1s connected and a path of 1s from top row to bottom row 2
45, 9689, 3730303, 1180202569, 340759985173, 95151328370775 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..6.

Chaim Goodman-Strauss, Notes on the number of m × n binary arrays with all 1’s connected and a path of 1’s from top row to bottom row (May 21 2020)

Chaim Goodman-Strauss, Mma notebook to accompany the above document

FORMULA

For a formula see the Goodman-Strauss links. - N. J. A. Sloane, May 22 2020

CROSSREFS

Cf. A163029-A163036.

Sequence in context: A209275 A199355 A290819 * A184136 A101994 A201004

Adjacent sequences:  A163032 A163033 A163034 * A163036 A163037 A163038

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 20 2009

STATUS

approved

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Last modified January 28 23:12 EST 2022. Contains 350670 sequences. (Running on oeis4.)