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a(1)=5; a(n)=floor((49+sum(a(1) to a(n-1)))/9).
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%I #2 Mar 30 2012 18:34:45

%S 5,6,6,7,8,9,10,11,12,13,15,16,18,20,22,25,28,31,34,38,42,47,52,58,64,

%T 71,79,88,98,109,121,134,149,166,184,205,227,253,281,312

%N a(1)=5; a(n)=floor((49+sum(a(1) to a(n-1)))/9).

%Y Cf. A073941, A112088, A072493.

%K nonn

%O 1,1

%A _Graeme McRae_, Jun 10 2006