OFFSET
1,1
COMMENTS
LINKS
R. Sprague, Über Zerlegungen in n-te Potenzen mit lauter verschiedenen Grundzahlen, Math. Z. 51 (1948) 466-468.
FORMULA
For n >= 2, a(n) <= 1 + Max_{m=2..n} A001661(m).
EXAMPLE
a(5) = 7809 as it can be written as a sum of one or more distinct positive m-th powers for 1 <= m <= 5 as follows. 1^5 + 2^5 + 6^5 = 2^4 + 6^4 + 7^4 + 8^4 = 3^3 + 5^3 + 14^3 + 17^3 = 1^2 + 8^2 + 88^2 = 7809^1 and no number less than 7809 can be written as such.
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
David A. Corneth and Peter Munn, Jul 30 2023
STATUS
approved