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A196014 Number of nX5 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself 1
1, 3, 13, 27, 106, 316, 835, 2350, 7232, 21846, 63985, 186029, 548387, 1625398, 4800819, 14129048, 41608725, 122724222, 362055916, 1067475979, 3146535362, 9276448225, 27352573231, 80649512515, 237779505381, 701041117758 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A196017

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +a(n-2) +a(n-3) +19*a(n-4) -7*a(n-5) -16*a(n-6) -26*a(n-7) -90*a(n-8) +26*a(n-10) +41*a(n-11) +143*a(n-12) +3*a(n-13) -26*a(n-14) -17*a(n-15) -40*a(n-16) -4*a(n-17) +36*a(n-18) -18*a(n-19) -24*a(n-20) +11*a(n-21) +8*a(n-22) -4*a(n-23) for n>26

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A271625 A099062 A318368 * A266215 A192535 A002304

Adjacent sequences: A196011 A196012 A196013 * A196015 A196016 A196017

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 26 2011

STATUS

approved

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Last modified February 3 02:45 EST 2023. Contains 360024 sequences. (Running on oeis4.)