%I #5 Jun 26 2021 21:41:30
%S 1,2,5,8,19,30,41,52,115,178,241,304,367,430,493,556,1175,1794,2413,
%T 3032,3651,4270,4889,5508,6127,6746,7365,7984,8603,9222,9841,10460,
%U 21539,32618,43697,54776,65855,76934,88013,99092,110171,121250,132329
%N a(n) = a(n-1) + Sum_{k=0..floor(log_2(n-1))} a(2^k), a(1) = 1.
%e a(7) = a(6) + a(1)+a(2)+a(4) = 30 + 1+2+8 = 41;
%e a(8) = a(7) + a(1)+a(2)+a(4) = 41 + 1+2+8 = 52;
%e a(9) = a(8) + a(1)+a(2)+a(4)+a(8) = 52 + 1+2+8+52 = 115;
%e a(10) = a(9) + a(1)+a(2)+a(4)+a(8) = 115 + 1+2+8+52 = 178.
%K nonn
%O 1,2
%A _Reinhard Zumkeller_, Dec 16 2007