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URL: https://oeis.org/A388290

⇱ A388290 - OEIS


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A388290
Position of the even Markoff numbers 2*A388289 in A002559.
4
2, 6, 9, 12, 19, 22, 26, 29, 34, 39, 42, 46, 50, 53, 57, 61, 62, 67, 74, 76, 80, 85, 89, 92, 94, 102, 103, 113, 114, 120, 124, 125, 129, 135, 138, 142, 144, 148, 150, 154, 160, 161, 171, 172, 176, 178, 184, 194, 196, 199, 204, 205, 211, 212, 219, 225, 226, 230
OFFSET
1,1
FORMULA
A002559(a(n)) = 2*A388289(n), for n >= 1.
EXAMPLE
A002559(a(2)) = A002559(6) = 2*A388289(2) = 2*17 = 34.
CROSSREFS
Sequence in context: A293789 A386546 A112870 * A169915 A236760 A086562
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Sep 16 2025
STATUS
approved