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A069447
Half the number of n X 9 binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.
92
256, 1731840, 3334295986, 3616567402784
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OFFSET
2,1
LINKS
Table of n, a(n) for n=2..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:
A283933
A016832
A103350
*
A227606
A016880
A227662
Adjacent sequences:
A069444
A069445
A069446
*
A069448
A069449
A069450
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Mar 22 2002
STATUS
approved
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Last modified June 7 00:43 EDT 2024. Contains 373140 sequences. (Running on oeis4.)