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

Author

Reinhard Zumkeller, Dec 13 2003

Keywords

• nonn

Comments

A091009(a(n)) > 1.

Crossrefs

Cf. A091012, A091011, A091010.