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A237475 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal 1
331, 2529, 19175, 160005, 1361797, 11938523, 105900839, 950031897, 8571447311, 77703482543, 706310544831, 6433899213915, 58681892142847, 535742328796239, 4894047982214525, 44727597830666259, 408889525691631919 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237481

LINKS

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

FORMULA

Empirical: a(n) = 17*a(n-1) -4*a(n-2) -1270*a(n-3) +4614*a(n-4) +32689*a(n-5) -189159*a(n-6) -315240*a(n-7) +3345462*a(n-8) -441205*a(n-9) -31268255*a(n-10) +33370256*a(n-11) +163213626*a(n-12) -289548851*a(n-13) -461018671*a(n-14) +1232093408*a(n-15) +554566403*a(n-16) -2950288660*a(n-17) +316531223*a(n-18) +4092259150*a(n-19) -1771232392*a(n-20) -3233425862*a(n-21) +2126933890*a(n-22) +1373888416*a(n-23) -1177913072*a(n-24) -282612928*a(n-25) +315961632*a(n-26) +21654656*a(n-27) -36843008*a(n-28) -182272*a(n-29) +1425408*a(n-30)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A152311 A255155 A154083 * A060894 A002228 A199820

Adjacent sequences:  A237472 A237473 A237474 * A237476 A237477 A237478

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2014

STATUS

approved

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Last modified January 22 13:41 EST 2020. Contains 331149 sequences. (Running on oeis4.)