The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A091697

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A091697

Values of m corresponding to members of A088966.
(history; published version)

#8 by Michel Marcus at Mon Aug 11 05:09:10 EDT 2014

STATUS

reviewed

approved

#7 by Joerg Arndt at Mon Aug 11 04:46:57 EDT 2014

STATUS

proposed

reviewed

#6 by Robert Israel at Mon Aug 11 03:23:59 EDT 2014

STATUS

editing

proposed

Discussion

Mon Aug 11

04:04

Michel Marcus: yes, thanks

#5 by Robert Israel at Mon Aug 11 03:23:35 EDT 2014

DATA

2, 3, 5, 9, 17, 33, 65, 35, 129, 257, 513, 1025, 2049

MAPLE

rad:= n -> convert(numtheory:-factorset(n), `*`):

count:= 0: lastr:= rad(1):

for n from 2 to 10^7 do

newr:= rad(n);

P[lastr, newr]:= n-1;

if assigned(P[newr, lastr]) then

count:= count+1; A[count]:= n-1; M[count]:= P[newr, lastr];

fi;

lastr:= newr;

od:

seq(M[n], n=1..count); # Robert Israel, Aug 11 2014

EXTENSIONS

a(13) from Robert Israel, Aug 11 2014

STATUS

approved

editing

#4 by Russ Cox at Sat Mar 31 13:20:56 EDT 2012

AUTHOR

_David Wasserman (wasserma(AT)spawar.navy.mil), _, Jan 29 2004

Discussion

Sat Mar 31

13:20

OEIS Server: https://oeis.org/edit/global/880

#3 by N. J. A. Sloane at Fri Sep 29 03:00:00 EDT 2006

EXAMPLE

a(2) = 3, corresponding to A088966(2) = 8, because A007947(8) = A007947(3+1) and A007947(3) = A007947(8+1).

KEYWORD

more,nonn,less,new

#2 by N. J. A. Sloane at Fri May 19 03:00:00 EDT 2006

KEYWORD

more,nonn,newless

#1 by N. J. A. Sloane at Thu Feb 19 03:00:00 EST 2004

NAME

Values of m corresponding to members of A088966.

DATA

2, 3, 5, 9, 17, 33, 65, 35, 129, 257, 513, 1025

OFFSET

1,1

COMMENTS

For every k >= 0, 2^k + 1 is in the sequence.

EXAMPLE

a(2) = 3, corresponding to A088966(2) = 8, because A007947(8) = A007947(3+1) and A007947(3) = A007947(8+1).

KEYWORD

more,nonn

AUTHOR

David Wasserman (wasserma(AT)spawar.navy.mil), Jan 29 2004

STATUS

approved