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A184025 1/8 the number of (n+1)X6 0..3 arrays with all 2X2 subblock sums the same 1
2312, 3781, 6650, 13603, 29432, 70867, 177386, 477919, 1325792, 3881491, 11637650, 36399823, 116243192, 384453427, 1295419706, 4494981199, 15848957072, 57232544851, 209314623650, 779774009743, 2931862472552, 11174138451187 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A184029

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..76

FORMULA

Empirical: a(n)=8*a(n-1)+16*a(n-2)-268*a(n-3)+189*a(n-4)+3388*a(n-5)-5824*a(n-6)-20048*a(n-7)+49756*a(n-8)+52752*a(n-9)-196896*a(n-10)-24192*a(n-11)+369216*a(n-12)-131328*a(n-13)-262656*a(n-14)+165888*a(n-15)

EXAMPLE

Some solutions for 4X6

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

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

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

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

CROSSREFS

Sequence in context: A288798 A035893 A260049 * A251436 A035771 A107567

Adjacent sequences:  A184022 A184023 A184024 * A184026 A184027 A184028

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 08 2011

STATUS

approved

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Last modified October 26 02:14 EDT 2021. Contains 348256 sequences. (Running on oeis4.)