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A014935
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a(1)=1, a(n) = n*18^(n-1) + a(n-1).
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1
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1, 37, 1009, 24337, 549217, 11886625, 249972193, 5147732449, 104327377633, 2087920281313, 41363059774177, 812583980724961, 15851391939265249, 307372900058661601, 5929573413789876961, 113875823277429211873
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..16.
Index entries for linear recurrences with constant coefficients, signature (37,-360,324).
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FORMULA
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a(n) = (1/289)*(1+18^n*(17*n-1)), with n >= 1. - Paolo P. Lava, Jan 13 2009
G.f.: x/((1 - x)*(1 - 18*x)^2). - Stefano Spezia, Mar 11 2020
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PROG
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(PARI) a(n) = (1+18^n*(17*n-1))/289; \\ Jinyuan Wang, Mar 11 2020
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CROSSREFS
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Sequence in context: A332857 A237857 A306472 * A124155 A218764 A217454
Adjacent sequences: A014932 A014933 A014934 * A014936 A014937 A014938
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KEYWORD
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nonn,easy
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AUTHOR
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Olivier Gérard
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STATUS
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approved
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