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Search: id:A077459
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| A077459 |
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Numbers n such that n and 3n have the same digital binary sum. |
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+0
2
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| 0, 3, 6, 7, 12, 14, 15, 24, 28, 30, 31, 45, 48, 51, 56, 60, 62, 63, 75, 89, 90, 93, 96, 99, 102, 103, 109, 112, 115, 120, 124, 126, 127, 139, 150, 151, 155, 177, 178, 180, 185, 186, 189, 192, 195, 198, 199, 204, 206, 207, 217, 218, 221, 224, 227, 230, 231, 237
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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n such that valuation(C(3n,n),2)= valuation(C(2n,n),2) - Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 20 2004
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EXAMPLE
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51 binary representation is [1, 1, 0, 0, 1, 1] and 3*51=153 binary representation is [1, 0, 0, 1, 1, 0, 0, 1], both binary sum = 4, hence 51 is in the sequence.
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CROSSREFS
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Sequence in context: A095029 A028792 A144795 this_sequence A048717 A022434 A163617
Adjacent sequences: A077456 A077457 A077458 this_sequence A077460 A077461 A077462
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KEYWORD
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base,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 01 2002
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