A049951 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, 2, 1, 6, 16, 28, 60, 142, 398, 656, 1316, 2654, 5422, 11358, 24714, 58132, 163038, 267946, 535896, 1071814, 2143742, 4287998, 8577994, 17164692, 34376158, 68962130, 138728128, 280672440, 574221574, 1200240586, 2612191482