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A204784 Number of (n+1)X2 0..7 arrays with the permanents of all 2X2 subblocks equal and nonzero 1

%I

%S 3871,13555,44641,180069,688431,2831919,11333145,46809649,190964841,

%T 791496341,3264483283,13586735979,56476461657,236142767631,

%U 987919418993,4150817865787,17465593473337,73745244701555,311975289448169

%N Number of (n+1)X2 0..7 arrays with the permanents of all 2X2 subblocks equal and nonzero

%C Column 1 of A204791

%H R. H. Hardin, <a href="/A204784/b204784.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..0..1....3..7....7..2....3..2....0..3....7..4....5..4....1..7....4..5....2..1

%e ..1..3....4..4....3..4....0..1....3..4....6..4....4..4....6..3....1..6....5..7

%e ..0..1....6..4....4..6....3..7....0..3....4..6....2..7....1..7....4..5....2..1

%e ..1..0....7..2....1..7....0..1....3..5....4..7....4..4....6..3....1..6....7..6

%e ..7..1....6..4....4..6....3..3....0..3....4..6....7..2....5..5....4..5....2..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 19 2012

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Last modified September 19 03:31 EDT 2021. Contains 347550 sequences. (Running on oeis4.)