A091013 Numbers having more than one divisor d such that for some x also d-x and d+x are divisors.

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

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 * A348715 A159886 A258914

Adjacent sequences: A091010 A091011 A091012 * A091014 A091015 A091016

Keyword

nonn

Author

Reinhard Zumkeller, Dec 13 2003

Status

approved