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A122250 Partial sums of A004128. 1
0, 1, 3, 7, 12, 18, 26, 35, 45, 58, 72, 87, 104, 122, 141, 162, 184, 207, 233, 260, 288, 318, 349, 381, 415, 450, 486, 526, 567, 609, 653, 698, 744, 792, 841, 891, 944, 998, 1053, 1110, 1168 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..40.

FORMULA

G.f.: (1/(1-x))*Sum{k=0..infinity, x^(3^k)/((1-x)*(1-x^(3^k)))}; a(n)=sum{k=1..n, sum{j=0..n, floor(k/3^j)}};

CROSSREFS

Sequence in context: A005228 A000969 A194117 * A169679 A024388 A184534

Adjacent sequences:  A122247 A122248 A122249 * A122251 A122252 A122253

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Aug 27 2006

STATUS

approved

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Last modified June 18 03:02 EDT 2013. Contains 226328 sequences.