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 A014931 a(1)=1, a(n) = n*16^(n-1) + a(n-1). 2
 1, 33, 801, 17185, 344865, 6636321, 124076833, 2271560481, 40926266145, 728121033505, 12822748939041, 223928981472033, 3883103678710561, 66933498461897505, 1147797409030816545, 19594541482740368161 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Index entries for linear recurrences with constant coefficients, signature (33,-288,256). FORMULA a(n) = (1+16^n*(15*n-1))/225. - Paolo P. Lava, Jan 13 2009 G.f.: x/((1 - x)*(1 - 16*x)^2). - Stefano Spezia, Mar 11 2020 MATHEMATICA RecurrenceTable[{a[1]==1, a[n]==n*16^(n-1)+a[n-1]}, a, {n, 20}] (* Harvey P. Dale, Sep 17 2019 *) PROG (PARI) a(n) = (1+16^n*(15*n-1))/225; \\ Jinyuan Wang, Mar 11 2020 CROSSREFS Sequence in context: A164750 A100788 A051565 * A197358 A299074 A101632 Adjacent sequences: A014928 A014929 A014930 * A014932 A014933 A014934 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified December 1 07:34 EST 2022. Contains 358454 sequences. (Running on oeis4.)