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Search: id:A131094
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| A131094 |
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Triangle where n-th row contains the smallest n positive integers (listed in order) with exactly n nonleading 0's in their binary representations. |
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+0
2
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| 2, 4, 9, 8, 17, 18, 16, 33, 34, 36, 32, 65, 66, 68, 72, 64, 129, 130, 132, 136, 144, 128, 257, 258, 260, 264, 272, 288, 256, 513, 514, 516, 520, 528, 544, 576, 512, 1025, 1026, 1028, 1032, 1040, 1056, 1088, 1152, 1024, 2049, 2050, 2052, 2056, 2064, 2080, 2112
(list; table; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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Binary representations of the terms in the first few rows:
10
100, 1001
1000, 10001, 10010
10000, 100001, 100010, 100100
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MAPLE
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A080791 := proc(n) local bdigs ; bdigs := convert(n, base, 2) ; nops(bdigs)-add(i, i=bdigs) ; end: A131094 := proc(n) local a, i; a := [] ; i := 2^n ; while nops(a) < n do while A080791(i) <> n do i := i+1 ; od: a := [op(a), i] ; i := i+1 ; od: RETURN(a) ; end: seq(op(A131094(n)), n=1..10) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 17 2007
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CROSSREFS
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Cf. A081118, A131095.
Sequence in context: A076125 A011033 A033149 this_sequence A129598 A125752 A103147
Adjacent sequences: A131091 A131092 A131093 this_sequence A131095 A131096 A131097
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KEYWORD
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nonn,tabl
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AUTHOR
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Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Jun 14 2007
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 17 2007
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