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Search: id:A069417
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A069417 Number of 3 X n binary arrays with a path of adjacent 1's and no path of adjacent 0's from top row to bottom row. +0
92
1, 15, 147, 1231, 9539, 70679, 509019, 3596367, 25070707, 173088903, 1186544331 (list; graph; listen)
OFFSET

1,2

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: A092398 A026893 A025440 this_sequence A051272 A021414 A055431

Adjacent sequences: A069414 A069415 A069416 this_sequence A069418 A069419 A069420

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Mar 22 2002.

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.


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