A049904 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, 2, 4, 7, 15, 29, 53, 84, 196, 391, 777, 1532, 3009, 5711, 10281, 16383, 38476, 76951, 153897, 307772, 615489, 1230671, 2460201, 4916223, 9821774, 19582980, 38935139, 76947379, 150209206, 285751655, 514138911, 819473546