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A152438
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a(n)=(19^n - 1)/(9*2^(3 - 2*Mod[n, 2])).
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0
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0, 1, 5, 381, 1810, 137561, 653415, 49659541, 235882820, 17927094321, 85153698025, 6471681049901, 30740484987030, 2336276859014281, 11097315080317835, 843395946104155461, 4006130743994738440
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OFFSET
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0,3
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LINKS
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MATHEMATICA
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a[n_] :=(19^n - 1)/(9*2^(3 - 2*Mod[n, 2]));
Table[a[n], {n, 0, 30}]
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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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