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A237001
Number of (n+1)X(2+1) 0..3 arrays with the upper median plus the lower median of every 2X2 subblock equal
1
1200, 10000, 79164, 762724, 7370124, 74701920, 760932408, 7859816444, 81402789128, 847305184388, 8832588630880, 92272185770416, 964836819508976, 10099582999780948, 105782273348965824, 1108619020342191224
OFFSET
1,1
COMMENTS
Column 2 of A237007
LINKS
FORMULA
Empirical: a(n) = 38*a(n-1) -468*a(n-2) +218*a(n-3) +42647*a(n-4) -286743*a(n-5) -862127*a(n-6) +15950000*a(n-7) -24849106*a(n-8) -391927524*a(n-9) +1608022032*a(n-10) +4542403924*a(n-11) -37525303758*a(n-12) -2872192710*a(n-13) +499944714462*a(n-14) -694033809584*a(n-15) -4068669093257*a(n-16) +11050525673198*a(n-17) +18486952651648*a(n-18) -93553579562390*a(n-19) -15640564245929*a(n-20) +496377275042677*a(n-21) -365880965169655*a(n-22) -1661629390163616*a(n-23) +2579019375022268*a(n-24) +3105274042211800*a(n-25) -9031762043603828*a(n-26) -1005832317657720*a(n-27) +18641702983195264*a(n-28) -9780640678096544*a(n-29) -21728749031190400*a(n-30) +24478231844265600*a(n-31) +10062281672931328*a(n-32) -26934026561310208*a(n-33) +5454921963176960*a(n-34) +13868674463645696*a(n-35) -8550224146538496*a(n-36) -1975603837353984*a(n-37) +3269184288915456*a(n-38) -651588353261568*a(n-39) -329553047715840*a(n-40) +164517579325440*a(n-41) -20741042995200*a(n-42)
EXAMPLE
Some solutions for n=3
..2..0..1....2..2..2....2..2..1....1..2..1....3..2..0....0..3..2....2..2..3
..1..0..1....1..2..2....2..3..2....0..2..0....2..2..2....2..2..0....1..2..2
..0..2..0....2..2..3....2..2..2....1..3..1....0..2..2....2..3..2....2..3..2
..0..1..0....3..0..2....2..1..2....0..2..0....2..3..0....0..2..0....2..2..1
CROSSREFS
Sequence in context: A043408 A234917 A167985 * A022056 A107520 A268877
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 02 2014
STATUS
approved