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A057894 Negabinary numbral "primes". 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

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

LINKS

Table of n, a(n) for n=0..59.

EXAMPLE

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

CROSSREFS

A005351, A005352, A057892, A057893.

Sequence in context: A102657 A202115 A047324 * A057694 A049303 A177987

Adjacent sequences:  A057891 A057892 A057893 * A057895 A057896 A057897

KEYWORD

easy,nonn

AUTHOR

Marc LeBrun, Sep 25 2000

STATUS

approved

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Last modified March 20 07:42 EDT 2019. Contains 321345 sequences. (Running on oeis4.)