%I A092898
%S A092898 1,0,4,12,48,192,768,3072,12288,49152,196608,786432,3145728,12582912,
%T A092898 50331648,201326592,805306368,3221225472,12884901888,51539607552,
%U A092898 206158430208,824633720832,3298534883328,13194139533312,52776558133248
%N A092898 Expansion of (1-4x+4x^2-4x^3)/(1-4x).
%C A092898 Partial sums are A092896. a(n+2)/4=A002001(n).
%F A092898 a(n)=3*4^n/16+13*0^n/16+sum{k=0..n, binom(n, k)(-1)^k(3k/4+k(k-1)/2) 
               }
%Y A092898 Sequence in context: A019309 A056632 A149385 this_sequence A110594 A151483 
               A111930
%Y A092898 Adjacent sequences: A092895 A092896 A092897 this_sequence A092899 A092900 
               A092901
%K A092898 easy,nonn
%O A092898 0,3
%A A092898 Paul Barry (pbarry(AT)wit.ie), Mar 12 2004