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 A217633 Number of nX4 arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..1 nX4 array 1
 6, 38, 244, 1418, 8706, 52120, 315378, 1900838, 11472148, 69210290, 417586442, 2519466108, 15201104542, 91714930026, 553357475040, 3338651662490, 20143579337906, 121535200857060, 733276159043790, 4424182455856594 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A217637 LINKS R. H. Hardin, Table of n, a(n) for n = 1..64 FORMULA Empirical: a(n) = 4*a(n-1) +20*a(n-2) -29*a(n-3) -124*a(n-4) +55*a(n-5) +330*a(n-6) -57*a(n-7) -498*a(n-8) -291*a(n-9) +965*a(n-10) +676*a(n-11) -991*a(n-12) -659*a(n-13) +771*a(n-14) +610*a(n-15) -581*a(n-16) -78*a(n-17) -36*a(n-18) +32*a(n-19) -94*a(n-20) +32*a(n-21) +68*a(n-22) -16*a(n-23) EXAMPLE Some solutions for n=3 ..0..1..1..0....0..0..0..0....0..1..0..0....0..1..0..1....0..0..0..1 ..0..0..0..0....0..0..0..1....0..0..1..0....0..0..0..0....1..0..0..0 ..0..1..0..0....0..0..1..1....0..1..0..0....0..0..0..0....0..0..0..1 CROSSREFS Sequence in context: A345464 A180030 A135030 * A162558 A215466 A147957 Adjacent sequences: A217630 A217631 A217632 * A217634 A217635 A217636 KEYWORD nonn AUTHOR R. H. Hardin Oct 09 2012 STATUS approved

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Last modified March 21 13:02 EDT 2023. Contains 361402 sequences. (Running on oeis4.)