A208564 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A208564

Number of nX5 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors

41, 3168, 260856, 21758476, 1820627588, 152454784170, 12768454002596, 1069433026366756, 89572151753280992, 7502281578834477922, 628367800932102007424, 52630140708145183027180, 4408137671151078527664476

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 5 of A208567

LINKS

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

FORMULA

Empirical: a(n) = 171*a(n-1) -10470*a(n-2) +325569*a(n-3) -5715687*a(n-4) +56148167*a(n-5) -245912801*a(n-6) -484495146*a(n-7) +10078833115*a(n-8) -31788474833*a(n-9) -62614662381*a(n-10) +560437441681*a(n-11) -642115987254*a(n-12) -2499011458897*a(n-13) +6268700558495*a(n-14) +963700261876*a(n-15) -12620524925764*a(n-16) +6372190291752*a(n-17) +1053712106560*a(n-18) -1060563638688*a(n-19) +11585781964416*a(n-20) +5647581956608*a(n-21) -36276070293504*a(n-22) +23488582508544*a(n-23) +1781937340416*a(n-24) -5735198490624*a(n-25) +1426902220800*a(n-26) for n>27

EXAMPLE

Some solutions for n=4

..0..0..0..0..0....0..0..0..0..0....0..0..0..0..1....0..1..0..1..2

..1..1..1..1..2....1..2..1..1..1....0..1..1..2..1....2..1..0..1..2

..2..2..2..2..0....2..0..0..2..2....0..1..2..0..0....0..0..2..0..0

..2..1..0..1..1....2..1..1..1..1....0..2..0..1..1....0..1..1..1..1

CROSSREFS

Sequence in context: A275349 A215826 A167246 * A209097 A233015 A282054

Adjacent sequences: A208561 A208562 A208563 * A208565 A208566 A208567

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 28 2012

STATUS

approved