A069425 - OEIS

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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.

0

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

(list; graph; refs; listen; history; text; internal format)

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