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Partial sums of A004977.
0

%I #4 Mar 30 2012 17:39:08

%S 1,3,6,11,19,29,42,58,81,113,157,213,289,391,523,697,924,1220,1603,

%T 2108,2787,3679,4830,6346,8334,10936,14336,18746,24505,32024,41833,

%U 54643,71353,93111,121467,158422,206611,269416,351219,457866,596954,778255

%N Partial sums of A004977.

%e a(4)=1+(1+1)+(2+1)+(1+2+1+1)=11

%Y Cf. A005150.

%K easy,nonn,base

%O 1,2

%A Philippe LALLOUET (philip.lallouet(AT)wanadoo.fr), Apr 11 2007

%E Edited and extended by _R. J. Mathar_, Jan 23 2008