0,3

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)}};

Sequence in context: A024517 A005228 A000969 this_sequence A024388 A109638 A008332

Adjacent sequences: A122247 A122248 A122249 this_sequence A122251 A122252 A122253

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Aug 27 2006