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A184600 1/4 the number of (n+1) X 6 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3. 1

%I #7 Jan 14 2017 01:41:54

%S 214,8268,411825,22581061,1291076970,75369979530,4461217004146,

%T 266823559411796,16087490826015621,976144514798586404,

%U 59534845819156963374,3646426116234905396563,224132828382262166503511

%N 1/4 the number of (n+1) X 6 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.

%C Column 5 of A184604.

%H R. H. Hardin, <a href="/A184600/b184600.txt">Table of n, a(n) for n = 1..96</a>

%e Some solutions for 3 X 6:

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 18 2011

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Last modified March 28 08:19 EDT 2024. Contains 371236 sequences. (Running on oeis4.)