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A208172 Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors 1
51, 33831, 26625693, 21002874867, 16567902881244, 13069424064243420, 10309684155118737894, 8132690993759302714128, 6415391762234363693863872, 5060717478941101906268770749, 3992096250836003074558657203441 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A208175

LINKS

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

FORMULA

Empirical: a(n) = 846*a(n-1) -46537*a(n-2) +1162868*a(n-3) -17173907*a(n-4) +166807056*a(n-5) -1125592122*a(n-6) +5444000730*a(n-7) -19238506974*a(n-8) +50296239144*a(n-9) -97844056164*a(n-10) +140881555908*a(n-11) -146587250745*a(n-12) +104533491168*a(n-13) -46130948685*a(n-14) +10416243600*a(n-15) -863591625*a(n-16) for n>17

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A208861 A208869 A208876 * A200798 A241117 A255832

Adjacent sequences:  A208169 A208170 A208171 * A208173 A208174 A208175

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 24 2012

STATUS

approved

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Last modified January 20 14:36 EST 2020. Contains 331094 sequences. (Running on oeis4.)