A163004 Number of n X 4 binary arrays with all 1s connected and a path of 1s from upper left corner to lower right corner.

1, 20, 234, 2423, 24455, 245972, 2473317, 24868730, 250043151, 2514035445, 25277060955, 254144975454, 2555267942068, 25691612225457, 258313003017344, 2597174783771339, 26112958991681036, 262549379235881855

Offset

1,2

Links

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

Crossrefs

Row 4 of A359573.

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