A163028 Number of n X n binary arrays with all 1s connected and a path of 1s from the top row to the bottom row.

1, 7, 144, 9362, 2075271, 1642690309, 4741764527414, 50301538415794232, 1966097907322824101263, 283293243539676951470723543, 150432229851691149674511947484546, 294212923045987478712868787193615243838, 2117957004814862762696618942898524645283531305

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..15

Crossrefs

Main diagonal of A359574.

Sequence in context: A263599 A217341 A156978 * A367527 A296684 A012826

Adjacent sequences: A163025 A163026 A163027 * A163029 A163030 A163031

Keyword

nonn

Author

R. H. Hardin, Jul 20 2009

Extensions

Terms a(8) and beyond from Andrew Howroyd, Jan 06 2023

Status

approved