%I A116394
%S A116394 1,1,4,11,33,100,305,937,2890,8943,27741,86216,268355,836297,2608818,
%T A116394 8144875,25446229,79545148,248780979,778400001,2436380402,7628211951,
%U A116394 23890103153,74836927720,234478937321,734802907841,2303073316042
%N A116394 Expansion of 1/((1+x)*sqrt(1-2x-3x^2)-x).
%C A116394 Diagonal sums of number triangle A116392.
%F A116394 a(n)=sum{k=0..floor(n/2), A116392(n-k,k)}.
%Y A116394 Sequence in context: A149233 A034745 A099159 this_sequence A127154 A062460 
               A098324
%Y A116394 Adjacent sequences: A116391 A116392 A116393 this_sequence A116395 A116396 
               A116397
%K A116394 easy,nonn
%O A116394 0,3
%A A116394 Paul Barry (pbarry(AT)wit.ie), Feb 12 2006