A069431 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A069431

Half the number of 5 X n binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.

0

15, 414, 11058, 291782, 7664414, 200993408, 5267756806, 138031237058, 3616567402784

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

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: A034675 A216343 A184222 * A133791 A361284 A376872

Adjacent sequences: A069428 A069429 A069430 * A069432 A069433 A069434

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2002

STATUS

approved