OFFSET
1,1
COMMENTS
Terms in A178130 not equal to (some previous term)*k^6, k>1.
Some c have more than one solutions for (a,b): 432, 1944, 3249, 3528, 5184, 7220, 10000. For example, 432^5 = 3732480^2 + 10368^3 = 3359232^2 + 15552^3, 3528^5 = 714208320^2 + 331632^3 = 464679936^2 + 691488^3 (are there 3 or more solutions?).
First two primes are a(2) = 19, a(25) = 701.
LINKS
Zak Seidov, Table of n, a(n) for n = 1..111 (all terms up to 20000)
EXAMPLE
8^5 = 104^2 + 28^3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Jun 28 2013
STATUS
approved