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A237959 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
340, 1944, 10942, 64146, 378532, 2202258, 12775098, 74571092, 435574126, 2537879368, 14784392084, 86221103762, 502834019146, 2931082498822, 17085974646934, 99619828773726, 580822873528914, 3386091855293476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237965

LINKS

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

FORMULA

Empirical: a(n) = 57*a(n-3) +519*a(n-4) +1274*a(n-5) +3325*a(n-6) +3022*a(n-7) -19803*a(n-8) -54071*a(n-9) -91685*a(n-10) -63215*a(n-11) +160130*a(n-12) +199163*a(n-13) +160145*a(n-14) +195840*a(n-15) -405526*a(n-16) -460000*a(n-17) +241952*a(n-18) +170336*a(n-19) -29888*a(n-20) +33280*a(n-21) -16256*a(n-22) -24576*a(n-23) +8192*a(n-24)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A306865 A205223 A238040 * A232514 A187383 A265969

Adjacent sequences:  A237956 A237957 A237958 * A237960 A237961 A237962

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 16 2014

STATUS

approved

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Last modified December 5 11:56 EST 2021. Contains 349557 sequences. (Running on oeis4.)