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A198903 Number of n X 5 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor. 2
15, 4801, 2125425, 948656912, 423503301834, 189062985604305, 84402688527136201, 37679579867128064832, 16821155393975907014458, 7509406150309683843851949, 3352396396661126098060061297 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A198906.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = 559*a(n-1) -54943*a(n-2) +2182857*a(n-3) -41132051*a(n-4) +348302393*a(n-5) -519526889*a(n-6) -11351340633*a(n-7) +79466721924*a(n-8) -227367989480*a(n-9) +329414183656*a(n-10) -247117199296*a(n-11) +89130224384*a(n-12) -11964372480*a(n-13).

EXAMPLE

Some solutions with values 0 to 4 for n=4

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

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

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

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

CROSSREFS

Cf. A198906.

Sequence in context: A191642 A348816 A206387 * A249966 A167823 A199099

Adjacent sequences:  A198900 A198901 A198902 * A198904 A198905 A198906

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 31 2011

STATUS

approved

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Last modified August 15 23:32 EDT 2022. Contains 356150 sequences. (Running on oeis4.)