A207802 Permutation of positive numbers. See comments.

1, 2, 3, 4, 5, 8, 6, 16, 7, 32, 9, 64, 10, 128, 12, 256, 11, 512, 18, 1024, 15, 2048, 24, 4096, 14, 8192, 27, 16384, 20, 32768, 36, 65536, 13, 131072, 48, 262144, 25, 524288, 54, 1048576, 21, 2097152, 72, 4194304, 30, 8388608, 81, 16777216, 22, 33554432, 96, 67108864, 40, 134217728, 108

Offset

1,2

Comments

a(1)=1; on places 2,4,6,8,... we put 2^m, m=1,2,3,..., i.e., numbers with the greatest prime divisor p_1=2; on places 3,7,11,15,... we put numbers with the greatest prime divisor p_2=3; on places 5,13,21,29,... we put numbers with the greatest prime divisor p_3=5; etc.

For general description of the order, see the comment in A207790.

Links

Table of n, a(n) for n=1..55.

Formula

For n>1, a(n) = A125624(A209268(n-1)). - Ivan Neretin, Apr 30 2016

Crossrefs

Cf. A207790, A207800, A207801.

Sequence in context: A219360 A275877 A245819 * A222250 A122317 A130992

Adjacent sequences: A207799 A207800 A207801 * A207803 A207804 A207805

Keyword

nonn

Author

Vladimir Shevelev and Peter J. C. Moses, Feb 20 2012

Extensions

a(30) fixed by Ivan Neretin, Apr 30 2016

Status

approved