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a(n)=a(n-1)+a(m), where m=2n-2-2^(p+1) and 2^p<n-1<=2^(p+1), for n >= 4.
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%I #9 Sep 07 2015 08:16:48

%S 1,3,3,6,12,15,21,36,72,75,81,96,132,207,303,510,1020,1023,1029,1044,

%T 1080,1155,1251,1458,1968,2991,4035,5190,6648,9639,14829,24468,48936,

%U 48939,48945,48960,48996,49071,49167,49374,49884

%N a(n)=a(n-1)+a(m), where m=2n-2-2^(p+1) and 2^p<n-1<=2^(p+1), for n >= 4.

%H Ivan Neretin, <a href="/A050067/b050067.txt">Table of n, a(n) for n = 1..8193</a>

%t Fold[Append[#1, #1[[-1]] + #1[[#2]]] &, {1, 3, 3}, Flatten@Table[2 k, {n, 5}, {k, 2^n}]] (* _Ivan Neretin_, Sep 07 2015 *)

%Y Cf. A050027, A050031, A050035, A050039, A050043, A050047, A050051, A050055, A050059, A050063, A050071 (similar, but with different initial conditions).

%K nonn

%O 1,2

%A _Clark Kimberling_