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A069362 Number of 4 X n binary arrays with a path of adjacent 1's from top row to bottom row. 10
1, 41, 1041, 22193, 433809, 8057905, 144769425, 2541013617, 43843180113, 746691527217, 12588144461329, 210502738714097, 3497001564166609, 57781030561348017, 950437243856526737, 15574913193760097649 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

G.f.: x(-8x^3-16x^2+6x+1)/[(1-16x)(8x^4+80x^3-74x^2+19x-1)].

CROSSREFS

Cf. 1 X n A000225, 2 X n A005061, n X 2 A001333, 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: A104349 A091314 A059762 * A016093 A130639 A196744

Adjacent sequences:  A069359 A069360 A069361 * A069363 A069364 A069365

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net), Mar 22 2002.

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Last modified February 17 13:24 EST 2012. Contains 206031 sequences.