A080944 Numbers having only trivial divisors that are also suffixes in binary representation.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 52, 53, 55, 56, 57, 58, 59, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 76, 77, 79, 80, 81, 82, 83

Offset: 1

Author

Reinhard Zumkeller, Feb 25 2003

Keywords

• nonn
• base

Comments

A080942(a(n))<=2; union of powers of 2 (A000079) and A080943; complement of A080945.

Links

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

Crossrefs

Cf. A007088, A080940, A080941.

Programs

Haskell

a080944 n = a080944_list !! (n-1)
a080944_list = filter ((<= 2) . a080942) [1..]
-- Reinhard Zumkeller, Mar 27 2014