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Search: id:A166456
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| 1, 2, 6, 12, 30, 60, 124, 248, 510, 1020, 2044, 4088, 8188, 16376, 32760, 65520, 131070, 262140, 524284, 1048568, 2097148, 4194296, 8388600, 16777200, 33554428, 67108856, 134217720, 268435440, 536870904, 1073741808, 2147483632
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n)=2^(n+1)-A001316(n). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 30 2009]
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EXAMPLE
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a(3) = 12 = (1 + 5 + 5 + 1)
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PROGRAM
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Contribution from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 30 2009: (Start)
(Python) def A000120(n):
...a=0
...while n > 0:
......a += n % 2
......n //= 2
...return a
def A001316(n):
...return 2**A000120(n)
def A166456(n):
...return 2**(n+1)-A001316(n)
print([A166456(n) for n in range(0, 80)])
(End)
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CROSSREFS
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A166455
Sequence in context: A080742 A005417 A058215 this_sequence A162214 A100071 A129912
Adjacent sequences: A166453 A166454 A166455 this_sequence A166457 A166458 A166459
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KEYWORD
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nonn,new
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Oct 14 2009
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EXTENSIONS
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Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 30 2009
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