OFFSET
0,2
EXAMPLE
For n = 3: 644 = 19 + 5^4 = 563 + 3^4 = 643 + 1^4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Aug 31 2023
EXTENSIONS
More terms from Jinyuan Wang, Sep 13 2023
STATUS
approved