%I

%S 23,35,52,78,117,176,264,396,594,891,1336,2004,3006,4509,6764,10146,

%T 15219,22828,34242,51363,77045,115567,173351,260026,390039,585059,

%U 877588,1316382,1974573,2961860,4442790,6664185,9996277,14994416

%N a(1)=23; a(n)=floor((47+sum(a(1) to a(n-1)))/2).

%Y Cf. A073941, A112088, A072493.

%K nonn

%O 1,1

%A _Graeme McRae_, Jun 10 2006