login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A069307 Number of 3 X n binary arrays with a path of adjacent 1's from upper left corner to anywhere in right hand column. 14
21, 110, 581, 3070, 16227, 85776, 453423, 2396868, 12670261, 66977242, 354053617, 1871590506, 9893561055, 52299127660, 276462513603, 1461430140016, 7725380293233, 40837737667414, 215875562691877 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..20.

FORMULA

G.f.: x^2*(21-37*x+14*x^3-8*x^4)/(1+2*x^5-7*x+9*x^2+x^3-4*x^4). - Vladeta Jovovic, Jul 02 2003

CROSSREFS

Cf. 2 X n A069306, 4 X n A069308, 5 X n A069309, 6 X n A069310, 7 X n A069311, 8 X n A069312, 9 X n A069313, 10 X n A069314, 11 X n A069315, 12 X n A069316, 13 X n A069317, 14 X n A069318, 15 X n A069319, 16 X n A069320, by columns A069294-A069305.

Sequence in context: A071333 A222347 A039611 * A157886 A039456 A182827

Adjacent sequences:  A069304 A069305 A069306 * A069308 A069309 A069310

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 14 2002

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 10 00:25 EDT 2020. Contains 335570 sequences. (Running on oeis4.)