A049900 a(n)=a(1)+a(2)+...+a(n-1)-a(m), where m=2n-3-2^(p+1) and 2^p<n-1<=2^(p+1).

1, 2, 1, 3, 6, 12, 24, 43, 68, 159, 318, 631, 1244, 2444, 4638, 8350, 13306, 31249, 62498, 124991, 249964, 499884, 999518, 1998110, 3992826, 7976984, 15904776, 31622086, 62494618, 121995928, 232079906, 417569970, 665554652