Search: id:A098827
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%I A098827
%S A098827 2,30,42,110,182,506,1406,2162,3422,3782,4290,4830,5402,6006,6806,11130,
%T A098827 11342,12210,13110,16770,23870,24806,27390,27722,31862,33306,34410,
%U A098827 34782,37442,37830,44310,49062,51302,56406,60762,64770,66822,68906
%N A098827 Square-free oblong (pronic) numbers.
%e A098827 a(1)=2 is oblong and square-free
%p A098827 ts_nsq_pronic:=proc(n) local i, ans; ans:=[ ]: for i from 1 to n do if 
               (numtheory[mobius]( i*(i+1) ) = -1 ) then ans:=[ op(ans),i*(i+1)]: 
               fi od; RETURN(ans) end: ts_nsq_pronic(500);
%Y A098827 Cf. A002378, A005117.
%Y A098827 Sequence in context: A127026 A105962 A113695 this_sequence A078208 A105403 
               A134644
%Y A098827 Adjacent sequences: A098824 A098825 A098826 this_sequence A098828 A098829 
               A098830
%K A098827 nonn
%O A098827 1,1
%A A098827 Jani Melik (jani_melik(AT)hotmail.com), Oct 09 2004

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