A049899 a(n)=a(1)+a(2)+...+a(n-1)-a(m), where m=2n-2-2^(p+1) and 2^p<n-1<=2^(p+1).

1, 1, 4, 5, 6, 16, 28, 45, 61, 166, 328, 645, 1261, 2401, 4323, 6890, 9291, 25471, 50938, 101865, 203701, 407281, 814083, 1626410, 3248331, 6478081, 12879768, 25454120, 49689111, 94526551, 170077063, 271081695, 365608246, 1002298186