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A304601 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero. 1
16, 22, 53, 179, 560, 1726, 5205, 15474, 46577, 140882, 425811, 1284730, 3876203, 11701804, 35329457, 106648194, 321916587, 971745234, 2933418071, 8855071730, 26730426635, 80690036458, 243576592865, 735277676028, 2219559525935 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A304604.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +3*a(n-2) -11*a(n-3) +10*a(n-4) +4*a(n-5) -67*a(n-6) +52*a(n-7) +80*a(n-8) -134*a(n-9) +50*a(n-10) +85*a(n-11) -134*a(n-12) +124*a(n-13) +62*a(n-14) -158*a(n-15) +85*a(n-16) -26*a(n-17) -85*a(n-18) +50*a(n-19) -19*a(n-20) +32*a(n-21) -22*a(n-22) +5*a(n-23) +43*a(n-24) -59*a(n-25) +33*a(n-26) +12*a(n-27) -34*a(n-28) +23*a(n-29) -4*a(n-30) -5*a(n-31) +4*a(n-32) -a(n-33) for n>39

EXAMPLE

Some solutions for n=5

..0..1..0..0..0. .0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0

..0..0..0..0..0. .1..1..0..0..0. .0..0..0..0..0. .0..0..1..1..0

..1..0..0..0..1. .1..1..0..0..0. .0..0..0..0..0. .0..1..0..1..0

..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .1..0..1..0..0

..0..1..0..1..0. .0..0..0..0..0. .0..1..0..0..0. .1..1..0..0..0

CROSSREFS

Cf. A304604.

Sequence in context: A242559 A242066 A303958 * A165338 A154877 A305337

Adjacent sequences:  A304598 A304599 A304600 * A304602 A304603 A304604

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 15 2018

STATUS

approved

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Last modified May 24 06:53 EDT 2019. Contains 323529 sequences. (Running on oeis4.)