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A209965 Number of (n+1)X5 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or two distinct values, and new values 0..3 introduced in row major order 1
162, 13529, 870686, 53890394, 3143493049, 176163769267, 9585247795332, 510324389383430, 26728547640264511, 1382481145423604439, 70813668245584753816, 3599637037473025226780, 181875667113421394973161 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A209969
LINKS
FORMULA
Empirical: a(n) = 160*a(n-1) -9858*a(n-2) +286721*a(n-3) -3505459*a(n-4) -7704489*a(n-5) +640517305*a(n-6) -4759487502*a(n-7) -21219049490*a(n-8) +420859791361*a(n-9) -878171254221*a(n-10) -12643232573808*a(n-11) +66259330277918*a(n-12) +122870759491994*a(n-13) -1553376671736484*a(n-14) +1219539182999473*a(n-15) +17359779478680752*a(n-16) -39146051553201926*a(n-17) -91438263542603406*a(n-18) +373898684344261096*a(n-19) +116854653298320024*a(n-20) -1799083158352232088*a(n-21) +998160450833133144*a(n-22) +4801216485839890224*a(n-23) -5451035382131524304*a(n-24) -7054956173126826080*a(n-25) +12732134852398029184*a(n-26) +4672289972159061760*a(n-27) -16728156971141573696*a(n-28) +1059265242914046976*a(n-29) +13059429141341396224*a(n-30) -4207097515631301632*a(n-31) -5978493921676298752*a(n-32) +3137966625793618432*a(n-33) +1468906693869291520*a(n-34) -1139164366776567808*a(n-35) -134802883891748864*a(n-36) +213153759748931584*a(n-37) -11638547304415232*a(n-38) -18765649522720768*a(n-39) +2857764298162176*a(n-40) +564292134895616*a(n-41) -120413963157504*a(n-42) -2136276467712*a(n-43) +869730877440*a(n-44)
EXAMPLE
Some solutions for n=4
..0..0..1..0..0....0..0..0..0..0....0..0..1..2..1....0..0..0..0..0
..1..0..1..1..0....0..1..0..1..0....1..0..1..1..1....0..0..0..0..0
..0..0..0..0..1....1..0..1..0..0....0..0..0..0..1....0..0..0..0..0
..2..2..0..0..0....1..1..0..0..2....3..0..1..0..1....0..0..1..0..0
..0..0..0..0..3....3..1..1..0..0....3..0..1..0..0....2..0..0..0..3
CROSSREFS
Sequence in context: A022151 A279917 A291131 * A230837 A183812 A036914
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2012
STATUS
approved

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Last modified May 30 18:48 EDT 2024. Contains 372974 sequences. (Running on oeis4.)