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A236424 Number of (n+1)X(2+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise 1

%I #5 Jan 25 2014 06:27:16

%S 487,5772,60193,544380,4505522,34394854,247470127,1692391516,

%T 11125768607,70778574186,438808934095,2664649821781,15926647839729,

%U 94055397322922,550759978627494,3206878777142928,18613731789595410,107906959499841906

%N Number of (n+1)X(2+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise

%C Column 2 of A236427

%H R. H. Hardin, <a href="/A236424/b236424.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

%e ..1..1..1....1..2..2....1..1..0....1..2..0....2..0..0....1..0..1....0..2..0

%e ..2..1..2....2..2..2....1..2..0....1..1..0....1..0..2....2..2..1....0..1..0

%e ..0..1..0....0..1..0....0..2..0....1..0..2....2..0..0....1..0..2....2..0..2

%e ..0..1..2....1..1..1....1..2..1....1..1..1....0..1..1....2..2..1....1..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 25 2014

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)