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Search: id:A057894
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| A057894 |
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Negabinary numbral "primes". |
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+0
3
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| 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; listen)
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OFFSET
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0,1
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COMMENT
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"Primes" have no other distinct divisors, up to multiplication by units. (Units are [1]=1 and [3]=-1.)
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EXAMPLE
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[2]=-2, [5]=5, [6]=2, [7]=3, [9]=-7, [13]=-3, etc
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CROSSREFS
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A005351, A005352, A057892, A057893.
Sequence in context: A153384 A102657 A047324 this_sequence A057694 A049303 A047217
Adjacent sequences: A057891 A057892 A057893 this_sequence A057895 A057896 A057897
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KEYWORD
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easy,nonn
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AUTHOR
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Marc LeBrun (mlb(AT)well.com), Sep 25 2000
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