A049949 a(n)=a(1)+a(2)+...+a(n-1)+a(m), where m=2^(p+1)+2-n and 2^p<n-1<=2^(p+1).

1, 2, 1, 6, 11, 27, 49, 99, 197, 492, 934, 1846, 3676, 7347, 14689, 29379, 58757, 146892, 279094, 550846, 1098021, 2194212, 4387512, 8774582, 17548869, 35097640, 70195230, 140390438, 280780860, 561561715, 1123123425, 2246246851