login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A086141 Permutation of A025487 (least prime signatures) which, when values are factored, exhibit self-similarity (cf. A008687). 4
1, 2, 4, 6, 8, 12, 36, 30, 16, 24, 72, 60, 216, 180, 900, 210, 32, 48, 144, 120, 432, 360, 1800, 420, 1296, 1080, 5400, 1260, 27000, 6300, 44100, 2310, 64, 96, 288, 240, 864, 720, 3600, 840, 2592, 2160, 10800, 2520, 54000, 12600, 88200, 4620, 7776, 6480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..50.

EXAMPLE

Factored sequences are

1

0 2 0 3 0 3 0 5 0 3 0 5 0 5 0 7 ...

0 0 4 2 0 0 9 3 0 0 9 3 0 0 25 5 ...

0 0 0 0 8 4 4 2 0 0 0 0 27 9 9 3 ...

0 0 0 0 0 0 0 0 16 8 8 4 8 4 4 2 ...

yielding

1 2 4 6 8 12 36 30 16 24 72 60 216 180 900 210 ...

CROSSREFS

Cf. A008687, A080801.

Sequence in context: A059901 A136101 A187779 * A067883 A283769 A117117

Adjacent sequences:  A086138 A086139 A086140 * A086142 A086143 A086144

KEYWORD

nonn

AUTHOR

Alford Arnold, Aug 24 2003

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 19 13:25 EST 2018. Contains 299333 sequences. (Running on oeis4.)