OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
a(1)=2 is oblong and squarefree.
MAPLE
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);
MATHEMATICA
Select[#*(# + 1) & /@ Range[250], MoebiusMu[#1] == -1 &] (* Amiram Eldar, Feb 22 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Jani Melik, Oct 09 2004
STATUS
approved