# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/

Search: id:a207125
Showing 1-1 of 1

%I A207125 #7 Mar 08 2023 13:31:05
%S A207125 12,144,612,2560,12288,49861,186822,712756,2628872,9322638,32786325,
%T A207125 113962102,389265450,1317047475,4424787530,14738119860,48761979210,
%U A207125 160532542000,525896099120,1715320212047,5575387622490,18064884103644
%N A207125 Number of 5 X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.
%C A207125 Row 5 of A207123.
%H A207125 R. H. Hardin, <a href="/A207125/b207125.txt">Table of n, a(n) for n = 1..210</a>
%F A207125 Empirical: a(n) = 9*a(n-1) -33*a(n-2) +124*a(n-3) -540*a(n-4) +1469*a(n-5) -3685*a(n-6) +11988*a(n-7) -25871*a(n-8) +49378*a(n-9) -140046*a(n-10) +244890*a(n-11) -364391*a(n-12) +1026031*a(n-13) -1432346*a(n-14) +1631553*a(n-15) -5342318*a(n-16) +5581642*a(n-17) -4568076*a(n-18) +21467119*a(n-19) -14534975*a(n-20) +7158188*a(n-21) -68838049*a(n-22) +21845322*a(n-23) -1202418*a(n-24) +176672722*a(n-25) -1251197*a(n-26) -21389899*a(n-27) -358454837*a(n-28) -82080698*a(n-29) +52348891*a(n-30) +562385994*a(n-31) +219301460*a(n-32) -67577952*a(n-33) -667860328*a(n-34) -321333520*a(n-35) +55353168*a(n-36) +585709344*a(n-37) +299576016*a(n-38) -33930144*a(n-39) -365057280*a(n-40) -178049664*a(n-41) +17630784*a(n-42) +153436032*a(n-43) +62083584*a(n-44) -7713792*a(n-45) -38257920*a(n-46) -10824192*a(n-47) +2239488*a(n-48) +4478976*a(n-49).
%e A207125 Some solutions for n=4
%e A207125 ..0..0..0..0....1..0..0..0....1..0..0..0....0..1..1..0....0..1..1..1
%e A207125 ..0..1..1..1....0..1..1..0....0..1..1..1....1..1..0..1....0..1..1..1
%e A207125 ..0..0..0..0....1..0..0..0....1..0..0..0....0..0..0..0....0..1..1..0
%e A207125 ..0..1..1..1....0..1..1..0....0..0..0..0....1..1..0..0....0..0..0..0
%e A207125 ..0..0..0..0....1..0..0..0....1..0..0..0....0..0..0..0....0..1..1..0
%Y A207125 Cf. A207123.
%K A207125 nonn
%O A207125 1,1
%A A207125 _R. H. Hardin_, Feb 15 2012

# Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE