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A369769
Numbers X such that X^2 + Y^2 = 5^(2*k) + 1 and X > Y > 0 and k is the quintal digit length of X-1.
2
5, 25, 115, 125, 551, 625, 2551, 2885, 3049, 3125, 15575, 15625, 72115, 78125, 303551, 390625, 1461799, 1790635, 1802885, 1847551, 1857449, 1946801, 1952875, 1953125, 8053505, 8468945, 9734425, 9765625, 36631645, 43890449, 45072115, 48828125, 215049449, 215418199
OFFSET
1,1
COMMENTS
The number of terms for a given k is A025435(5^(2*k)+1).
LINKS
CROSSREFS
Cf. A025435.
Cf. A369703 (base 2), A369768 (base 3), this sequence (base 5), A368418 (base 10).
Sequence in context: A092440 A196985 A124534 * A261383 A089947 A267467
KEYWORD
nonn,base
AUTHOR
A.H.M. Smeets, Jan 31 2024
STATUS
approved