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Search: id:A059673
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| A059673 |
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Sum of binary numbers with n 1's and one (non-leading) 0. |
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+0
4
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| 0, 2, 11, 38, 109, 284, 699, 1658, 3833, 8696, 19447, 42998, 94197, 204788, 442355, 950258, 2031601, 4325360, 9175023, 19398638, 40894445, 85983212, 180355051, 377487338, 788529129, 1644167144, 3422552039, 7113539558, 14763950053
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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For n>0: a(n) = sum of n-th row of the triangle in A164874. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 29 2009]
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FORMULA
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a(n) =(2n-1)*2^n+1-n.
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EXAMPLE
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a(4)=109 since the binary sum 11110+11101+11011+10111 is 30+29+27+23
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CROSSREFS
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A030130. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 29 2009]
Sequence in context: A038607 A079009 A097651 this_sequence A166989 A143550 A000175
Adjacent sequences: A059670 A059671 A059672 this_sequence A059674 A059675 A059676
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KEYWORD
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easy,nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), Feb 05 2001
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