%I A004275
%S A004275 0,1,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,
               48,50,
%T A004275 52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,
%U A004275 98,100,102,104
%N A004275 1 together with nonnegative even numbers.
%F A004275 G.f.: x(1+x^2)/(1-x)^2 - Paul Barry (pbarry(AT)wit.ie), Feb 28 2003
%Y A004275 Cf. A004277.
%Y A004275 Sequence in context: A055964 A055966 A087113 this_sequence A119432 A005843 
               A076032
%Y A004275 Adjacent sequences: A004272 A004273 A004274 this_sequence A004276 A004277 
               A004278
%K A004275 easy,nonn
%O A004275 0,3
%A A004275 N. J. A. Sloane (njas(AT)research.att.com).