A090334 Numbers with at least one divisor >1 that is a prefix of another divisor in binary representation.

4, 6, 8, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 26, 27, 28, 30, 32, 34, 36, 38, 39, 40, 42, 44, 45, 46, 48, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 66, 68, 70, 72, 74, 75, 76, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 92, 93, 94, 95, 96, 98, 99, 100, 102, 104, 105

Offset: 1

Author

Reinhard Zumkeller, Nov 26 2003

Keywords

• nonn
• base

Comments

Complement of A090332.

Even numbers >2 belong to this sequence.

Examples

			Divisors >1 of 51: {3,17,51}, in binary: {11, 10001, 110011}, as '11' is a prefix of '110011' 51 is a term.
		

Crossrefs

Cf. A090330, A090331.

Formula

A090330(a(n)) > 0.

A090331(a(n)) > 1.