1,1

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

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

Cf. A163029-A163035.

Sequence in context: A221772 A221123 A231826 * A033512 A201008 A172722

Adjacent sequences: A163033 A163034 A163035 * A163037 A163038 A163039

nonn

R. H. Hardin Jul 20 2009

approved