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A080025 Numbers n having at least one divisor d such that in binary representation d and n/d have the same number of 1's as n. +0
3
1, 2, 4, 8, 9, 16, 18, 32, 36, 49, 64, 72, 98, 128, 133, 144, 196, 225, 256, 259, 266, 273, 288, 385, 392, 450, 512, 518, 532, 546, 576, 585, 645, 770, 784, 897, 900, 961, 1024, 1029, 1035, 1036, 1064, 1065, 1092, 1152, 1155, 1161, 1170, 1290, 1539, 1540, 1568 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Cf. A007088, A000120, A000005.

Cf. A080024(a(n))>0, A080026 is a subsequence.

Sequence in context: A114400 A023898 A125853 this_sequence A025611 A049439 A079931

Adjacent sequences: A080022 A080023 A080024 this_sequence A080026 A080027 A080028

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jan 21 2003

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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