A057894 Negabinary numbral "primes".

2, 5, 6, 7, 9, 13, 15, 17, 23, 27, 29, 31, 33, 39, 43, 47, 51, 53, 55, 57, 61, 71, 77, 79, 83, 87, 89, 91, 99, 101, 107, 109, 115, 117, 121, 127, 129, 139, 141, 147, 149, 151, 167, 169, 173, 181, 185, 191, 197, 199, 201, 203, 205, 209, 213, 223, 227, 233, 239, 241

Offset: 0

Author

Marc LeBrun, Sep 25 2000

Keywords

• easy
• nonn

Comments

"Primes" have no other distinct divisors, up to multiplication by units. (Units are [1]=1 and [3]=-1.)

Examples

			[2]=-2, [5]=5, [6]=2, [7]=3, [9]=-7, [13]=-3, etc
		

Crossrefs

A005351, A005352, A057892, A057893.