login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091013 Numbers having more than one divisor d such that for some x also d-x and d+x are divisors. 2
12, 18, 24, 30, 36, 42, 45, 48, 54, 56, 60, 66, 72, 75, 78, 80, 84, 90, 96, 102, 105, 108, 112, 114, 120, 126, 132, 135, 138, 140, 144, 150, 156, 160, 162, 165, 168, 174, 180, 182, 186, 192, 195, 196, 198, 200, 204, 210, 216, 222, 224, 225, 228, 231, 234, 240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A091009(a(n)) > 1.

LINKS

Table of n, a(n) for n=1..56.

CROSSREFS

Cf. A091012, A091011, A091010.

Sequence in context: A136446 A074726 A341475 * A159886 A258914 A241646

Adjacent sequences:  A091010 A091011 A091012 * A091014 A091015 A091016

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 13 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 19 03:38 EDT 2021. Contains 345125 sequences. (Running on oeis4.)