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A163004 Number of nX4 binary arrays with all 1s connected and a path of 1s from upper left corner to lower right corner 1
1, 20, 234, 2423, 24455, 245972, 2473317, 24868730, 250043151, 2514035445, 25277060955, 254144975454, 2555267942068, 25691612225457, 258313003017344, 2597174783771339, 26112958991681036, 262549379235881855 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n=1..44

CROSSREFS

Sequence in context: A004315 A253010 A074334 * A278320 A061139 A061121

Adjacent sequences:  A163001 A163002 A163003 * A163005 A163006 A163007

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 20 2009

STATUS

approved

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Last modified January 27 18:40 EST 2022. Contains 350611 sequences. (Running on oeis4.)