login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A069433
Half the number of 7 X n binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.
0
63, 7616, 896026, 103948054, 11974298030, 1374566625956
OFFSET
1,1
CROSSREFS
Cf. 2 X n A000079, n X 1 A000225, 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: A251011 A234616 A093263 * A178634 A174763 A160871
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 22 2002
STATUS
approved