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A274892 Number of n X 5 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2. 1
8, 108, 86, 290, 913, 3017, 9863, 32539, 107369, 354366, 1171235, 3869271, 12787884, 42266197, 139689475, 461723614, 1526118256, 5044271535, 16673106905, 55109948877, 182157291955, 602093030588, 1990121537282, 6578044463591 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A274895.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +16*a(n-2) -120*a(n-4) -55*a(n-5) +549*a(n-6) +319*a(n-7) -1772*a(n-8) -891*a(n-9) +4300*a(n-10) +1407*a(n-11) -7992*a(n-12) -1155*a(n-13) +11470*a(n-14) +a(n-15) -12854*a(n-16) +1155*a(n-17) +11372*a(n-18) -1407*a(n-19) -7960*a(n-20) +891*a(n-21) +4357*a(n-22) -320*a(n-23) -1820*a(n-24) +55*a(n-25) +560*a(n-26) -120*a(n-28) -a(n-29) +16*a(n-30) -a(n-32) for n>34.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A274895.

Sequence in context: A199658 A027013 A239985 * A105261 A187288 A275134

Adjacent sequences:  A274889 A274890 A274891 * A274893 A274894 A274895

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 10 2016

STATUS

approved

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Last modified July 28 00:30 EDT 2021. Contains 346316 sequences. (Running on oeis4.)