A086133 Smallest prime factor of arithmetic derivative of n equals that of n.

4, 8, 12, 16, 20, 24, 27, 28, 32, 36, 40, 44, 45, 48, 52, 56, 60, 63, 64, 68, 72, 76, 80, 84, 88, 92, 96, 99, 100, 104, 108, 112, 116, 117, 120, 124, 128, 132, 136, 140, 144, 148, 152, 153, 156, 160, 164, 168, 171, 172, 175, 176, 180, 184, 188, 192, 196, 200, 204

Offset

1,1

Links

Table of n, a(n) for n=1..59.

Crossrefs

Cf. A003415.

Sequence in context: A367086 A285466 A274141 * A100716 A328251 A276079

Adjacent sequences: A086130 A086131 A086132 * A086134 A086135 A086136

Keyword

nonn

Author

Labos Elemer, Jul 23 2003

Status

approved