A069373 Number of 15 X n binary arrays with a path of adjacent 1's from top row to bottom row.

1, 665857, 93756691401, 7424156719466465, 443201843190147840905, 22514756623847166766088601, 1033389306060085070259831696233, 44303320783994564548274261485609937, 1810016576213721403223848632848406276905, 71378753836026506130829884874045437745415233

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Crossrefs

Cf. 1 X n A000225, 2 X n A005061, n X 2 A001333, vertical path of 1 A069361-A069395, vertical paths of 0+1 A069396-A069416, vertical path of 1 not 0 A069417-A069428, no vertical paths A069429-A069447, no horizontal or vertical paths A069448-A069452.

Sequence in context: A038827 A038816 A144132 * A270801 A348832 A162840

Adjacent sequences: A069370 A069371 A069372 * A069374 A069375 A069376

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Extensions

a(6)-a(10) from Sean A. Irvine, Apr 30 2024

Status

approved