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A103733
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Column k=6 sequence of array A103728.
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0
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1, 191, 853, 7537, 17587, 71369, 363749, 574621, 1895149, 3744761, 5123791, 9167525, 19974397, 39789335, 49243141, 89502667, 129269281, 154098649, 253600309, 345942995, 535842121, 917491105, 1180249901, 1333475377
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OFFSET
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0,2
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COMMENTS
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The two a(n) formulas, given below, produce natural numbers for all n>=0.
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LINKS
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Table of n, a(n) for n=0..23.
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FORMULA
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a(n)=A103728(n+4, 6)=(1 +(p(n+4)-1)*binomial(p(n+4)-1, 6))/p(n+4), with p(n):=A000040(n) (n-th prime).
a(n)= (2484 - 3388*p(n+4) + 2359*p(n+4)^2 - 910*p(n+4)^3 + 196*p(n+4)^4 - 22*p(n+4)^5 + p(n+4)^6)/6! = sum(A103718(k, m)*p(n+4)^m, m=0..6)/6!.
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CROSSREFS
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Sequence in context: A082445 A108848 A052165 * A217500 A142451 A083980
Adjacent sequences: A103730 A103731 A103732 * A103734 A103735 A103736
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang, Feb 24 2005
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STATUS
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approved
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