OFFSET
1,1
COMMENTS
Oblong numbers that are squarefree numbers.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
MATHEMATICA
Select[#*(# + 1) & /@ Range[150], SquareFreeQ] (* Amiram Eldar, Feb 22 2021 *)
PROG
(PARI) for(n=1, 1e4, if(issquarefree(n) && issquarefree(n+1), print1(n*(n+1)", "))) \\ Charles R Greathouse IV, Mar 18 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Irina Gerasimova, Oct 02 2013
EXTENSIONS
Wrong term removed and more terms added by Amiram Eldar, Feb 22 2021
STATUS
approved