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A247798 n-th positive integer relatively prime to 2*n - 1. 3
1, 2, 3, 4, 7, 6, 7, 14, 9, 10, 19, 12, 16, 20, 15, 16, 28, 26, 19, 32, 21, 22, 43, 24, 29, 41, 27, 38, 46, 30, 31, 55, 44, 34, 55, 36, 37, 71, 50, 40, 61, 42, 57, 68, 45, 58, 73, 63, 49, 82, 51, 52, 116, 54, 55, 86, 57, 76, 95, 74, 67, 95, 78, 64, 100, 66 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Central terms of triangle A077581.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

PROG

(Haskell)

a247798 n = a077581 (2 * n - 1) n

CROSSREFS

Cf. A077581, A069213.

Sequence in context: A319651 A074846 A120225 * A130685 A210202 A260436

Adjacent sequences:  A247795 A247796 A247797 * A247799 A247800 A247801

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 26 2014

STATUS

approved

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Last modified June 5 11:52 EDT 2020. Contains 334840 sequences. (Running on oeis4.)