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A014907
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a(1)=1, a(n) = 22*a(n-1) + n.
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2
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1, 24, 531, 11686, 257097, 5656140, 124435087, 2737571922, 60226582293, 1324984810456, 29149665830043, 641292648260958, 14108438261741089, 310385641758303972, 6828484118682687399, 150226650611019122794
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OFFSET
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1,2
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LINKS
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FORMULA
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a(1)=1, a(2)=24, a(3)=531, a(n) = 24*a(n-1) - 45*a(n-2) + 22*a(n-3). - Vincenzo Librandi, Oct 19 2012
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MATHEMATICA
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LinearRecurrence[{24, -45, 22}, {1, 24, 531}, 20] (* Vincenzo Librandi, Oct 19 2012 *)
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PROG
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(Magma) I:=[1, 24, 531]; [n le 3 select I[n] else 24*Self(n-1) - 45*Self(n-2) + 22*Self(n-3): n in [1..20]]; // Vincenzo Librandi, Oct 19 2012
(Maxima)
a[1]:1$
a[2]:24$
a[3]:531$
a[n]:=24*a[n-1]-45*a[n-2]+22*a[n-3]$
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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