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A214142 Number of 0..4 colorings of a 1 X (n+1) array circular in the n+1 direction with new values 0..4 introduced in row major order. 3
1, 1, 4, 11, 40, 147, 568, 2227, 8824, 35123, 140152, 559923, 2238328, 8950579, 35796856, 143176499, 572684152, 2290692915, 9162684280, 36650562355, 146601899896, 586406900531, 2345626204024, 9382502019891, 37530002487160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 1 of A214141.

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) -7*a(n-2) -6*a(n-3) +8*a(n-4).

Empirical: a(n) = 2^n/6 -11*(-1)^n/30 +4^n/30+1/6. - R. J. Mathar, Jul 07 2012

EXAMPLE

Some solutions for n=4

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

CROSSREFS

Sequence in context: A149266 A149267 A149268 * A077236 A327025 A228190

Adjacent sequences:  A214139 A214140 A214141 * A214143 A214144 A214145

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 05 2012

STATUS

approved

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Last modified September 18 13:34 EDT 2020. Contains 337169 sequences. (Running on oeis4.)