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 A184450 1/36 the number of (n+2)X4 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last 1
 234, 600, 1591, 4517, 16029, 58413, 216477, 930657, 3947025, 16260821, 75637161, 341430753, 1469964069, 7087591425, 32968435401, 145042964117, 711996798489, 3363303213633, 14962011182037, 74119134136017, 352902194702745 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A184457 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n)=6*a(n-1)-11*a(n-2)+195*a(n-3)-1134*a(n-4)+2079*a(n-5)-11600*a(n-6)+62796*a(n-7)-115126*a(n-8)+263520*a(n-9)-1204344*a(n-10)+2207964*a(n-11)-2907648*a(n-12)+10219824*a(n-13)-18736344*a(n-14)+17243280*a(n-15)-42140736*a(n-16)+77258016*a(n-17)-55857600*a(n-18)+82301184*a(n-19)-150885504*a(n-20)+92378880*a(n-21)-60466176*a(n-22)+110854656*a(n-23)-60466176*a(n-24) EXAMPLE Some solutions with a(1,1)=0 for 6X4 ..0..0..0..0....0..0..1..2....0..1..0..0....0..0..0..0....0..0..0..0 ..0..2..1..0....2..2..1..0....0..2..1..0....2..1..0..2....1..2..0..1 ..1..0..2..1....2..2..2..2....0..0..2..0....2..0..1..2....0..2..1..0 ..0..0..0..0....0..1..0..2....0..1..0..0....0..0..0..0....2..2..2..2 ..0..2..1..0....2..1..2..0....0..1..2..0....0..1..2..0....1..2..0..1 ..0..1..2..0....1..1..1..1....2..0..0..2....1..2..0..1....2..1..0..2 CROSSREFS Sequence in context: A264021 A256086 A186897 * A338391 A304615 A287878 Adjacent sequences: A184447 A184448 A184449 * A184451 A184452 A184453 KEYWORD nonn AUTHOR R. H. Hardin Jan 14 2011 STATUS approved

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Last modified December 8 07:12 EST 2023. Contains 367662 sequences. (Running on oeis4.)