A156670 Positive integers k such that k^2 = (m^5 - n^5)/(m - n) for some nonnegative coprime integers m, n.

1, 11, 1169341, 20188985439712961, 3506790234728288196345900732301, 5190947078637547438603476743093680561, 1041849413143039115171399776907273433339109867252078165841

Offset

1,2

Links

Table of n, a(n) for n=1..7.

Example

1169341 belongs to this sequence since 1169341^2 = (808^5 - 627^5) / (808 - 627) with gcd(808, 627) = 1.

Crossrefs

Cf. A156668, A156669.

Sequence in context: A211238 A014127 A049192 * A116061 A013858 A230376

Adjacent sequences: A156667 A156668 A156669 * A156671 A156672 A156673

Keyword

nonn

Author

Max Alekseyev, Feb 13 2009

Status

approved