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A241105 Number of nX5 0..2 arrays with no element equal to one or three horizontal or vertical neighbors, with new values 0..2 introduced in row major order 1
8, 116, 1522, 19814, 259388, 3374086, 44030862, 574246744, 7489718098, 97685897406, 1274061880332, 16617079770494, 216729255718838, 2826706576812536, 36867513064014682, 480847045785788134 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A241108

LINKS

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

FORMULA

Empirical: a(n) = 14*a(n-1) +2*a(n-2) -175*a(n-3) -54*a(n-4) +1648*a(n-5) -42588*a(n-6) -24344*a(n-7) +167248*a(n-8) +247904*a(n-9) -88832*a(n-10) +33429248*a(n-11) +48635904*a(n-12) +27281408*a(n-13) -32276480*a(n-14) -600080384*a(n-15) -9134145536*a(n-16) -11089739776*a(n-17) -2071986176*a(n-18) +11282677760*a(n-19) +94019518464*a(n-20) +716320014336*a(n-21) +518617300992*a(n-22) +438086664192*a(n-23) +618475290624*a(n-24) -6597069766656*a(n-25) -17592186044416*a(n-26)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A293992 A220575 A240890 * A214695 A235338 A231553

Adjacent sequences:  A241102 A241103 A241104 * A241106 A241107 A241108

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 16 2014

STATUS

approved

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Last modified November 30 03:46 EST 2021. Contains 349417 sequences. (Running on oeis4.)