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 A014936 a(1)=1, a(n) = n*19^(n-1) + a(n-1). 2
 1, 39, 1122, 28558, 680163, 15536757, 344857924, 7495831836, 160347899205, 3387224876995, 70828953712806, 1468712060491434, 30241806008351527, 618983574479950353, 12604083861223212168, 255502116339219984952 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..16. Index entries for linear recurrences with constant coefficients, signature (39,-399,361). FORMULA G.f.: x/((1 - x)*(1 - 19*x)^2). - Stefano Spezia, Mar 11 2020 MATHEMATICA RecurrenceTable[{a[1]==1, a[n]==n*19^(n-1)+a[n-1]}, a, {n, 20}] (* Harvey P. Dale, Oct 01 2012 *) PROG (PARI) a(n) = (1+19^n*(18*n-1))/324; \\ Jinyuan Wang, Mar 11 2020 CROSSREFS Sequence in context: A028219 A209076 A251327 * A227524 A240442 A009729 Adjacent sequences: A014933 A014934 A014935 * A014937 A014938 A014939 KEYWORD nonn,easy AUTHOR Olivier Gérard STATUS approved

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Last modified May 18 01:54 EDT 2024. Contains 372614 sequences. (Running on oeis4.)