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A237177 Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the minimum minus the lower median of every 2X2 subblock 1
402, 2700, 18062, 122882, 836966, 5677464, 38493628, 261361496, 1774467580, 12042475374, 81729026700, 554763275586, 3765522928076, 25557463477518, 173466926926018, 1177405064329382, 7991560816156102, 54241702525468106 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237182

LINKS

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

FORMULA

Empirical: a(n) = 92*a(n-3) +882*a(n-4) +2709*a(n-5) +9218*a(n-6) +14959*a(n-7) -31445*a(n-8) -146986*a(n-9) -482868*a(n-10) -943838*a(n-11) +336994*a(n-12) +3543506*a(n-13) +7186094*a(n-14) +9446548*a(n-15) -6491849*a(n-16) -31924590*a(n-17) -28642956*a(n-18) -15283695*a(n-19) +28491559*a(n-20) +84665284*a(n-21) +23411816*a(n-22) -43724842*a(n-23) -23336351*a(n-24) -1820626*a(n-25) +19596591*a(n-26) -12757942*a(n-27) -45558441*a(n-28) -16827881*a(n-29) +14050962*a(n-30) +8840398*a(n-31) -8247379*a(n-32) -1547726*a(n-33) +2428485*a(n-34) -15020*a(n-35) +347656*a(n-36) +182740*a(n-37) -117680*a(n-38) -21136*a(n-39) -2176*a(n-40)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A104391 A250753 A158312 * A128767 A097740 A325151

Adjacent sequences:  A237174 A237175 A237176 * A237178 A237179 A237180

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2014

STATUS

approved

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Last modified May 28 18:24 EDT 2022. Contains 354122 sequences. (Running on oeis4.)