

A120241


a(n) = (n  2^floor(log(n)/log(2)) + 1)th integer among those positive integers not among the earlier terms of the sequence.


1



1, 2, 4, 3, 6, 8, 10, 5, 9, 12, 14, 16, 18, 20, 22, 7, 13, 17, 21, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 11, 19, 25, 29, 33, 37, 41, 45, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 15, 27, 35, 43, 49, 53, 57, 61, 65
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OFFSET

1,2


COMMENTS

This sequence is a permutation of the positive integers. n  2^floor(log(n)/log(2)) + 1 = A062050(n).


LINKS

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


EXAMPLE

The first 6 terms of the sequence are 1,2,4,3,6,8. Now 7  2^floor(log(7)/log(2)) + 1 = 4. So we want the 4th term of those positive integers not occurring among the first 6 terms of the sequence (i.e. the 4th term among 5,7,9,10,11,...). So a(7) = 10.


CROSSREFS

Cf. A120242, A062050.
Sequence in context: A039864 A101906 A297403 * A155487 A128555 A039874
Adjacent sequences: A120238 A120239 A120240 * A120242 A120243 A120244


KEYWORD

easy,nonn


AUTHOR

Leroy Quet, Jun 11 2006


EXTENSIONS

Extended by Ray Chandler, Jun 19 2006


STATUS

approved



