A080946 Numbers having exactly three divisors that are also suffixes in binary representation.

15, 27, 30, 39, 45, 51, 54, 60, 75, 78, 85, 87, 90, 99, 102, 108, 111, 119, 120, 123, 125, 135, 147, 150, 153, 156, 159, 165, 170, 171, 174, 175, 180, 183, 187, 195, 198, 204, 205, 207, 216, 219, 221, 222, 238, 240, 243, 245, 246, 250, 267, 270, 279, 285, 287

Offset: 1

Author

Reinhard Zumkeller, Feb 25 2003

Keywords

• nonn
• base

Comments

A080942(a(n))=3.

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A080943, A080945, A080947, A007088, A080940, A080941.

Programs

Haskell

a080946 n = a080946_list !! (n-1)
a080946_list = filter ((== 3) . a080942) [1..]
-- Reinhard Zumkeller, Mar 27 2014