

A130465


Triangle where the nth 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
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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



