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!)
A216613 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of a 3Xn array with new integer colors introduced in row major order 1
1, 2, 2, 15, 41, 716, 2847, 83440, 426422, 18171918, 112072316, 6423127757, 46054057965, 3376465219485, 27457462735926, 2486327138729353, 22530435476364494, 2454996141671330713, 24463971326544703312 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A216612

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..41

EXAMPLE

Some solutions for n=4

..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1

..2..x..3..x....2..x..3..x....1..x..2..x....2..x..3..x....2..x..3..x

..x..0..x..4....x..4..x..5....x..0..x..3....x..4..x..1....x..1..x..0

CROSSREFS

Sequence in context: A185244 A329920 A006929 * A215900 A264838 A184718

Adjacent sequences:  A216610 A216611 A216612 * A216614 A216615 A216616

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 10 2012

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 November 27 01:16 EST 2021. Contains 349344 sequences. (Running on oeis4.)