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A069435
Half the number of 9 X n binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.
0
255, 127710, 62820362, 30539121806, 14741384488782
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..5.
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:
A175824
A238996
A069409
*
A221214
A212933
A270876
Adjacent sequences:
A069432
A069433
A069434
*
A069436
A069437
A069438
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Mar 22 2002
STATUS
approved
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Last modified April 20 11:40 EDT 2024. Contains 371838 sequences. (Running on oeis4.)