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A237803 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal 1
295, 1775, 10433, 65777, 413659, 2653941, 17059551, 110537541, 717782983, 4679120817, 30556330231, 199989593763, 1310729227831, 8603242105963, 56531698121213, 371878534270081, 2448554048752631, 16136308096010383 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237809

LINKS

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

FORMULA

Empirical: a(n) = 13*a(n-1) +32*a(n-2) -995*a(n-3) +1203*a(n-4) +30639*a(n-5) -80894*a(n-6) -484821*a(n-7) +1819880*a(n-8) +4094432*a(n-9) -21975137*a(n-10) -15423994*a(n-11) +159646072*a(n-12) -20537582*a(n-13) -731838006*a(n-14) +482636414*a(n-15) +2157585399*a(n-16) -2313673429*a(n-17) -4063269643*a(n-18) +6080908617*a(n-19) +4636945145*a(n-20) -9951312215*a(n-21) -2581453624*a(n-22) +10458352359*a(n-23) -391104242*a(n-24) -7005351042*a(n-25) +1614638448*a(n-26) +2873473052*a(n-27) -1062608408*a(n-28) -658678792*a(n-29) +325725984*a(n-30) +66680608*a(n-31) -46683520*a(n-32) -308864*a(n-33) +2464512*a(n-34) -202240*a(n-35) -15360*a(n-36)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A277338 A252083 A279052 * A238512 A003780 A338592

Adjacent sequences:  A237800 A237801 A237802 * A237804 A237805 A237806

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 13 2014

STATUS

approved

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Last modified August 7 20:35 EDT 2022. Contains 355994 sequences. (Running on oeis4.)