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A210409 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having three or four distinct values, and new values 0..3 introduced in row major order 1
9576, 2574592, 677993552, 178971208720, 47230418649056, 12464482425454304, 3289463792785895520, 868112796901730209328, 229101105240473375413568, 60461401929182464236989616, 15956191555192198665777462352 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A210413

LINKS

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

FORMULA

Empirical: a(n) = 276*a(n-1) -844*a(n-2) -647137*a(n-3) +5856940*a(n-4) +402216721*a(n-5) -5862695617*a(n-6) -54643074114*a(n-7) +1382343039112*a(n-8) -3102790608576*a(n-9) -89911455972644*a(n-10) +660007977690996*a(n-11) +263588914646272*a(n-12) -18055429128783448*a(n-13) +51374341139205968*a(n-14) +113931146918069408*a(n-15) -752286799961769696*a(n-16) +423125539061919552*a(n-17) +3650072001026978048*a(n-18) -6040761986311450112*a(n-19) -5385080244386082816*a(n-20) +17461611564608397312*a(n-21) -2457130524259205120*a(n-22) -16604319853477298176*a(n-23) +6207057768744222720*a(n-24) +6168586199070932992*a(n-25) -2183260302370406400*a(n-26) -667625816443584512*a(n-27) +191550881093648384*a(n-28) +17950332629811200*a(n-29) -3348386568732672*a(n-30) +49529562857472*a(n-31)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A254889 A133449 A275687 * A250761 A038825 A038814

Adjacent sequences: A210406 A210407 A210408 * A210410 A210411 A210412

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 21 2012

STATUS

approved

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Last modified December 3 21:46 EST 2022. Contains 358543 sequences. (Running on oeis4.)