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A130465 Triangle where the n-th row consists of the n smallest positive integers which are coprime to the number of divisors of n. 1
1, 1, 3, 1, 3, 5, 1, 2, 4, 5, 1, 3, 5, 7, 9, 1, 3, 5, 7, 9, 11, 1, 3, 5, 7, 9, 11, 13, 1, 3, 5, 7, 9, 11, 13, 15, 1, 2, 4, 5, 7, 8, 10, 11, 13, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 1, 5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 35, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..91.

EXAMPLE

Triangle begins:

1,

1, 3,

1, 3, 5,

1, 2, 4, 5,

1, 3, 5, 7, 9,

1, 3, 5, 7, 9, 11,

...

CROSSREFS

Cf. A120841, A130466.

Sequence in context: A087493 A118125 A143732 * A348417 A272120 A194437

Adjacent sequences:  A130462 A130463 A130464 * A130466 A130467 A130468

KEYWORD

nonn,tabl

AUTHOR

Leroy Quet, May 27 2007

EXTENSIONS

More terms from D. S. McNeil, Mar 23 2009

STATUS

approved

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Last modified December 5 10:11 EST 2021. Contains 349543 sequences. (Running on oeis4.)