

A120619


a(n) = b(n)th integer among those positive integers not yet occurring in {a(k)}, where {b(k)} is the concatenation of the divisors of the positive integers.


1



1, 2, 4, 3, 7, 5, 8, 11, 6, 14, 9, 12, 15, 19, 10, 22, 13, 17, 21, 27, 16, 23, 31, 18, 24, 29, 36, 20, 39, 25, 28, 32, 34, 38, 46, 26, 49, 30, 35, 44, 54, 33, 41, 45, 59, 37, 42, 48, 55, 65, 40, 68, 43, 50, 52, 58, 63, 75, 47, 78, 51, 56, 61, 64, 72, 85, 53, 62, 71, 90, 57, 66
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OFFSET

1,2


COMMENTS

b(n)= A027750(n). {a(n)} is a permutation of the positive integers.


LINKS

Table of n, a(n) for n=1..72.


EXAMPLE

The first 6 terms of {a(k)} are 1,2,4,3,7,5. So the positive integers not occurring among these terms are 6,8,9,10,... The 7th term of A027750 is 2. So a(7) = 8.


CROSSREFS

Cf. A027750, A120620.
Sequence in context: A191735 A191666 A215673 * A346298 A084385 A073885
Adjacent sequences: A120616 A120617 A120618 * A120620 A120621 A120622


KEYWORD

nonn,base


AUTHOR

Leroy Quet, Jun 18 2006


EXTENSIONS

Extended by Ray Chandler, Jun 19 2006
Edited by Charles R Greathouse IV, Apr 27 2010


STATUS

approved



