The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #9 Oct 03 2025 11:31:07
%S 44641,793645,5719981,78694139,708088685,8567876319,83984193841,
%T 962997162651,9813730640761,109872686433517,1141540082437751,
%U 12639021064159207,132727790537865509,1461507197066363903
%N Number of (n+1)X4 0..7 arrays with the permanents of all 2X2 subblocks equal and nonzero.
%C Column 3 of A204791
%H R. H. Hardin, <a href="/A204786/b204786.txt">Table of n, a(n) for n = 1..98</a>
%e Some solutions for n=4
%e ..4..6..5..2....7..6..6..2....5..1..6..2....0..4..1..1....6..6..3..5
%e ..5..0..5..4....3..0..3..2....5..5..0..5....1..4..0..4....0..6..3..7
%e ..7..6..5..2....5..6..3..4....4..2..6..1....0..4..1..5....6..6..3..5
%e ..5..0..5..4....3..0..3..2....5..5..0..5....1..4..0..4....0..6..3..7
%e ..3..6..0..6....4..6..3..4....0..6..6..0....0..4..1..4....6..6..3..5
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 19 2012