Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A069443
Half the number of n X 5 binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.
0
0, 16, 2304, 157058, 7664414, 317229344, 11974298030, 427585649578, 14741384488782, 496652156206058, 16475668543000750, 540790107010874580, 17620412998483400934, 571161367966749399684, 18446500586660704024820, 594209705207122247276746
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..16.
FORMULA
a(n) = 2^(5*n-1) - A069380(n) + A069405(n). - Sean A. Irvine, Aug 23 2024
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: A196884 A165126 A241368 * A227658 A298197 A016876
Adjacent sequences: A069440 A069441 A069442 * A069444 A069445 A069446
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Mar 22 2002
EXTENSIONS
More terms from Sean A. Irvine, Aug 23 2024
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified October 19 20:07 EDT 2024. Contains 376916 sequences.
License Agreements, Terms of Use, Privacy Policy