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A017164
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a(n) = (9*n)^4.
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1
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0, 6561, 104976, 531441, 1679616, 4100625, 8503056, 15752961, 26873856, 43046721, 65610000, 96059601, 136048896, 187388721, 252047376, 332150625, 429981696, 547981281, 688747536, 855036081
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OFFSET
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0,2
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LINKS
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FORMULA
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G.f.: -6561*x*(1+x)*(x^2 + 10*x + 1) / (x-1)^5. - R. J. Mathar, Jul 17 2014
a(n) = 5*a(n-1)-10*a(n-2)+10*a(n-3)-5*a(n-4)+a(n-5). - Wesley Ivan Hurt, Apr 21 2021
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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