Search: id:A049898 Results 1-1 of 1 results found. %I A049898 %S A049898 1,1,4,5,10,20,40,77,153,310,620,1237,2473,4941,9872,19724,39411,78898, %T A049898 157796,315589,631177,1262349,2524688,5049356,10098675,20197274, %U A049898 40394391,80788472,161576327,323151418,646300368,1292595805 %N A049898 a(n)=a(1)+a(2)+...+a(n-1)-a(m), where m=n-1-2^p and 2^p