A069425 Number of n X 5 binary arrays with a path of adjacent 1's and no path of adjacent 0's from top row to bottom row.

1, 211, 9539, 300651, 8168645, 206458895, 5022868187, 119647195507, 2816023729437, 65818825735031, 1532136293558119, 35579894275049831, 825082170362304285, 19117256012937548815, 442728846445605819023, 10249950234312030878755, 237262687880593853560805

Offset

1,2

Links

Table of n, a(n) for n=1..17.

Formula

a(n) = A069380(n) - 2 * A069405(n). - Sean A. Irvine, Aug 23 2024

Crossrefs

Cf. 2 X n A001047, n X 2 A034182, 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: A229519 A289983 A212851 * A276461 A093732 A116075

Adjacent sequences: A069422 A069423 A069424 * A069426 A069427 A069428

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Extensions

More terms from Sean A. Irvine, Aug 23 2024

Status

approved