OFFSET
1,1
EXAMPLE
3 is a term as 3 = 1^2 + 1^3 + 1^4.
6 is a term as 6 = 2^2 + 1^3 + 1^4.
18 is a term. The possibilities are 1^2 + 1^3 + 2^4 or 3^2 + 2^3 + 1^4 or 4^2 + 1^3 + 1^4 (considering only minimal possible exponents for bases equal to 1).
CROSSREFS
KEYWORD
nonn
AUTHOR
Alberto Zanoni, Jan 31 2022
EXTENSIONS
Definition clarified by Alberto Zanoni, Feb 28 2022
STATUS
approved