A049975 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, 3, 3, 10, 27, 47, 101, 239, 670, 1104, 2215, 4467, 9126, 19117, 41597, 97844, 274415, 450989, 901985, 1804007, 3608206, 7217277, 14437917, 28890484, 57859695, 116072535, 233498088, 472409446, 966492099, 2020166249