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A237474 Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal 1
81, 331, 1337, 5819, 25665, 116187, 532185, 2467403, 11527361, 54215595, 256228025, 1215875547, 5787814977, 27622298363, 132098089113, 632791544555, 3035361216705, 14575924319179, 70056176836729, 336952478074235 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A237481

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +8*a(n-2) -176*a(n-3) +86*a(n-4) +1544*a(n-5) -1268*a(n-6) -6840*a(n-7) +5915*a(n-8) +15792*a(n-9) -13396*a(n-10) -17304*a(n-11) +15632*a(n-12) +6016*a(n-13) -7552*a(n-14) +1536*a(n-15)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A237504 A222162 A237481 * A237868 A237861 A236902

Adjacent sequences:  A237471 A237472 A237473 * A237475 A237476 A237477

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2014

STATUS

approved

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Last modified October 5 10:20 EDT 2022. Contains 357255 sequences. (Running on oeis4.)