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A214139 Number of 0..4 colorings on an nX7 array circular in the 7 direction with new values 0..4 introduced in row major order 1
147, 522515, 2000093424, 7658621867351, 29325981412599886, 112293482777565310571, 429988214977169477452677, 1646487940037763716348859705, 6304643807380348053085274173830 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A214141

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..65

FORMULA

Empirical: a(n) = 4156*a(n-1) -1272609*a(n-2) +80884549*a(n-3) -1222656178*a(n-4) -19887912212*a(n-5) +527430399664*a(n-6) -2643328241280*a(n-7) +3940919419904*a(n-8) -1580167634944*a(n-9)

EXAMPLE

Some solutions for n=4

..0..1..2..0..2..0..1....0..1..2..3..4..0..4....0..1..0..1..2..1..2

..1..2..3..1..3..4..0....4..2..4..1..2..1..3....1..0..2..3..1..2..0

..4..3..2..3..4..3..1....1..0..1..3..4..0..4....2..4..3..4..2..3..1

..3..4..0..1..2..0..2....3..2..0..1..3..1..0....0..3..2..1..3..4..2

CROSSREFS

Sequence in context: A020328 A075925 A097729 * A215656 A308889 A214619

Adjacent sequences:  A214136 A214137 A214138 * A214140 A214141 A214142

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 05 2012

STATUS

approved

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Last modified August 14 07:04 EDT 2020. Contains 336477 sequences. (Running on oeis4.)