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A235259 Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise 1

%I #5 Jan 05 2014 12:38:24

%S 2400,75744,2691067,64470056,1538378437,27988093692,507441199620,

%T 7534804140934,111681101728373,1415861956568375,17929576294589042,

%U 199950651421904706,2227935030929519936,22325110214811735679

%N Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise

%C Column 2 of A235261

%H R. H. Hardin, <a href="/A235259/b235259.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

%e ..0..2..3....1..0..1....0..0..3....0..2..2....3..0..3....2..0..0....0..3..0

%e ..2..3..0....1..1..3....0..1..2....2..1..1....0..0..1....0..2..2....1..3..2

%e ..2..2..0....3..0..3....3..2..3....3..3..0....0..3..0....2..2..0....3..3..3

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014

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Last modified March 4 05:23 EST 2024. Contains 370522 sequences. (Running on oeis4.)