A119911 Natural numbers with number of divisors not equal to a Lucas number.

12, 16, 18, 20, 24, 28, 30, 32, 36, 40, 42, 44, 45, 48, 50, 52, 54, 56, 60, 63, 66, 68, 70, 72, 75, 76, 78, 80, 81, 84, 88, 90, 92, 96, 98, 99, 100, 102, 104, 105, 108, 110, 112, 114, 116, 117, 120, 124, 126, 128, 130, 132, 135, 136, 138, 140, 144, 147, 148

Offset: 1

Author

Giovanni Teofilatto, Aug 02 2006

Keywords

• easy
• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000032.

Complement to A119885.

Programs

Mathematica

With[{lnos=LucasL[Range[0,20]]},Select[Range[300],!MemberQ[ lnos, DivisorSigma[ 0,#]]&]] (* Harvey P. Dale, May 11 2014 *)

Extensions

More terms from Harvey P. Dale, May 11 2014