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!)
A265621 Number of 3Xn 0..3*n-1 arrays with upper left zero and lower right 3*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two. 1
3, 45, 5625, 392320, 13534874, 3413887598, 1130198405370, 53578062122213, 13108218265241141, 992125896408438521, 244355616796007755084, 26142858782722268963104, 5253247467346100142679906 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A265619.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..33

EXAMPLE

Some solutions for n=3

..0..1..3....0..2..1....0..4..5....0..2..3....0..4..3....0..4..3....0..8..7

..2..4..3....2..4..6....6..4..5....3..4..3....0..4..2....2..4..5....8..4..6

..5..6..8....2..0..8....8..7..8....3..4..8....5..4..8....8..4..8....5..7..8

CROSSREFS

Cf. A265619.

Sequence in context: A057863 A302156 A229415 * A124488 A086683 A155203

Adjacent sequences:  A265618 A265619 A265620 * A265622 A265623 A265624

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 10 2015

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 September 25 07:27 EDT 2021. Contains 347654 sequences. (Running on oeis4.)