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A210081 Number of (n+1)X4 0..3 arrays containing all values 0..3 with every 2X2 subblock having one, three or four distinct values, and new values 0..3 introduced in row major order 1
762, 82691, 7853122, 735082380, 68665065250, 6412474476465, 598825420604059, 55920736247669053, 5222101046613170832, 487660554256085032486, 45539680595791970480828, 4252676350134684608035531 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A210086

LINKS

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

FORMULA

Empirical: a(n) = 111*a(n-1) -1551*a(n-2) -11620*a(n-3) +269796*a(n-4) -346276*a(n-5) -10657824*a(n-6) +37514734*a(n-7) +105399645*a(n-8) -595931403*a(n-9) +25518343*a(n-10) +3128667030*a(n-11) -3607436824*a(n-12) -4027147296*a(n-13) +9243102400*a(n-14) -2810113344*a(n-15) -3425981120*a(n-16) +1936238208*a(n-17) +61521408*a(n-18) -60604416*a(n-19)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A253616 A253611 A326369 * A083645 A145718 A049516

Adjacent sequences:  A210078 A210079 A210080 * A210082 A210083 A210084

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 17 2012

STATUS

approved

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Last modified November 15 01:25 EST 2019. Contains 329143 sequences. (Running on oeis4.)