OFFSET
1,1
MATHEMATICA
Select[Range[150], SquareFreeQ[Floor[(#^3-#)/4]] &] (* Stefano Spezia, Aug 19 2024 *)
PROG
(Magma) [k: k in [2..150] | IsSquarefree(Floor((k^3-k) div 4))];
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Aug 18 2024
STATUS
approved