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A236612 Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the upper median of every 2X2 subblock 1
390, 2586, 17114, 106184, 645208, 4152180, 26549772, 165983800, 1030960714, 6559482790, 41617435108, 261155702658, 1635429768844, 10351073058430, 65443794339874, 411533381973194, 2586183990959816, 16330252501785100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236618

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-2) +43*a(n-3) +968*a(n-4) +1219*a(n-5) +848*a(n-6) +1022*a(n-7) -59812*a(n-8) -48024*a(n-9) +199299*a(n-10) +34257*a(n-11) +110622*a(n-12) +235004*a(n-13) -1402148*a(n-14) +410643*a(n-15) +1245654*a(n-16) -1480077*a(n-17) +2710856*a(n-18) -1245093*a(n-19) -2253045*a(n-20) +2250775*a(n-21) -4602803*a(n-22) +1885365*a(n-23) +2227221*a(n-24) -1911884*a(n-25) +2191380*a(n-26) -813800*a(n-27) -664553*a(n-28) +479557*a(n-29) -129361*a(n-30) +128225*a(n-31) -10056*a(n-32) -7436*a(n-33) +3464*a(n-34) -1712*a(n-35) +128*a(n-36) for n>40

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A108573 A206653 A202429 * A332419 A207575 A318174

Adjacent sequences:  A236609 A236610 A236611 * A236613 A236614 A236615

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 29 2014

STATUS

approved

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Last modified December 7 07:01 EST 2021. Contains 349567 sequences. (Running on oeis4.)