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%I #2 Mar 31 2012 13:21:32
%S 1,1,1,2,2,5,5,12,17,31,31,96,96,197,324,629,629,1695,1695,4374,6266,
%T 10671,10671,34402,38776,73274,109371,223510,223510,634267,634267,
%U 1527075,2172013,3699717,4557494,12736034,12736034,25473763,38283071
%N Number of finite sequences b with b(0) = 1, b(i+1) = b(i)+d where d|b(i), ending with n.
%F a(1) = 1, for n>1, a(n) = sum_{d|n, d<n} a(n-d).
%Y Cf. A117497, A122206, A067951.
%K nonn
%O 1,4
%A _Franklin T. Adams-Watters_, Aug 25 2006