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Search: id:A062878
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| 1, 3, 6, 15, 24, 60, 102, 255, 384, 960, 1632, 4080, 6168, 15420, 26214
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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In binary this sequence looks like 1, 11, 110, 1111, 11000, 111100, 1100110, 11111111, 110000000, 1111000000, 11001100000, 111111110000, 1100000011000, 11110000111100, 110011001100110, ...
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FORMULA
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a(2^n-1)=2^(2^n)-1 . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Apr 05 2007
a(n)=Sum_{k, 0<=k<=n}A127872(n,k)*2^k . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Oct 09 2007
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CROSSREFS
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Sequence in context: A044888 A006639 A118035 this_sequence A020991 A079825 A134774
Adjacent sequences: A062875 A062876 A062877 this_sequence A062879 A062880 A062881
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KEYWORD
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nonn
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AUTHOR
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Antti Karttunen Jun 26 2001.
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