OFFSET
1,3
EXAMPLE
64 is a term because it is both the fourth cube and the fourth 12-gonal number.
MATHEMATICA
Select[Table[-4 n + 5 n^2 , {n, 0, 10000}], IntegerQ @ Cbrt[#] &]
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Kelvin Voskuijl, Dec 11 2024
STATUS
approved