A049950 a(n)=a(1)+a(2)+...+a(n-1)+a(m), where m=n-1-2^p and 2^p<n-1<=2^(p+1).

1, 2, 1, 5, 11, 21, 43, 85, 174, 344, 689, 1377, 2758, 5522, 11054, 22130, 44302, 88520, 177041, 354081, 708166, 1416338, 2832686, 5665394, 11330830, 22661749, 45323668, 90647681, 181296050, 362593481, 725189726, 1450384984