A049956 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, 3, 7, 16, 30, 62, 137, 320, 579, 1160, 2333, 4712, 9682, 20204, 43960, 103412, 186621, 373244, 746501, 1493048, 2986354, 5973548, 11950648, 23916788, 47916784, 96103400, 193326604, 391133708, 800210656, 1672607924