%I A050262
%S A050262 1,1,1,4,10,27,79,238,736,2322,7445,24190,79470,263534,880966,2965576,
%T A050262 10044096,34202268,117026156,402139968,1387243056,4802307553,
%U A050262 16677543678,58087052893,202855613896,710171007580,2491870287323
%N A050262 G.f.: ( 1 + x + x^2 - x^3 - x^4 - Sqrt[ 1 - 2 x - 5 x^2 - 4 x^3 - 3 x^4 
               - 4 x^5 - x^6 + 2 x^7 + x^8 ] ) / ( 2 x (1 + x) ).
%Y A050262 Sequence in context: A108672 A000495 A027067 this_sequence A032248 A092504 
               A034920
%Y A050262 Adjacent sequences: A050259 A050260 A050261 this_sequence A050263 A050264 
               A050265
%K A050262 easy,nonn
%O A050262 0,4
%A A050262 Emanuele Munarini (munarini(AT)mate.polimi.it), May 09 2003