OFFSET
1,1
COMMENTS
Subsequence of A293283.
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..10000
EXAMPLE
9^2 = 7^2 + 2^5 and gcd(7, 2, 9) = 1.
122^2 = 121^2 + 3^5 and gcd(121, 3, 122) = 1.
88929^2 = 72122^2 + 77^5 and gcd(88929,72122,77) = 1. - Chai Wah Wu, Oct 07 2017
MATHEMATICA
Do[If[IntegerQ[(n^2 - a^2)^(1/5)] && GCD[a, n] == 1, Print[n]], {n, 134600}, {a, (n^2 - 1)^(1/2)}]
PROG
(PARI) isok(n) = for (k=1, n-1, if (ispower(n^2-k^2, 5, &m) && (gcd([n, k, m])==1), return (1)); ); return (0); \\ Michel Marcus, Oct 07 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
XU Pingya, Oct 04 2017
EXTENSIONS
Term 88929 added by Chai Wah Wu, Oct 07 2017
STATUS
approved