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!)
A298662 Number of nX3 0..1 arrays with every element equal to 0, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 1
1, 0, 3, 1, 5, 8, 7, 25, 25, 58, 95, 155, 299, 494, 905, 1623, 2867, 5260, 9421, 17149, 31225, 56740, 103795, 189417, 346621, 634790, 1162643, 2132211, 3910471, 7175862, 13172677, 24185043, 44417767, 81586900, 149883961, 275388205, 506024365 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A298667.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-2) +a(n-3) -4*a(n-4) -6*a(n-5) -3*a(n-6) +5*a(n-7) +7*a(n-8) -a(n-9) +2*a(n-11) -2*a(n-12)

EXAMPLE

Some solutions for n=8

..0..1..0. .0..1..1. .0..1..0. .0..1..0. .0..1..1. .0..0..1. .0..1..0

..1..1..1. .1..1..1. .1..1..1. .1..1..1. .1..1..1. .0..0..0. .1..1..1

..1..1..1. .1..0..1. .0..1..0. .0..1..0. .1..0..1. .0..1..0. .1..1..1

..1..0..0. .1..1..1. .1..1..1. .1..1..1. .1..1..1. .0..0..0. .0..0..1

..1..0..0. .0..1..1. .0..1..0. .1..1..1. .1..1..0. .0..0..0. .0..0..1

..1..1..1. .1..1..0. .1..1..1. .1..0..1. .0..1..1. .0..1..0. .1..1..1

..1..1..1. .1..1..1. .1..1..1. .1..1..1. .1..1..1. .0..0..0. .1..1..1

..0..1..0. .0..1..1. .0..1..0. .1..1..0. .1..1..0. .1..0..0. .0..1..0

CROSSREFS

Cf. A298667.

Sequence in context: A124420 A176105 A094353 * A306780 A209996 A340804

Adjacent sequences:  A298659 A298660 A298661 * A298663 A298664 A298665

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 24 2018

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 May 15 18:26 EDT 2021. Contains 343920 sequences. (Running on oeis4.)