OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n=1..21
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 20 2009
STATUS
approved