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Search: id:A129629
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| 1, 1, 3, 7, 14, 31, 63, 123, 255, 511, 1015, 2047, 4092, 8176, 16383, 32767, 65503, 131061, 262143, 524223, 1048575, 2097151, 4194162, 8388607, 16777208, 33554175, 67108863, 134217693, 268434943, 536870911, 1073741823
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OFFSET
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1,3
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COMMENT
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Possibly identical to A011947.
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FORMULA
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a(n)=2^n-A138944(n) - M. F. Hasler (www.univ-ag.fr/~mhasler), May 03 2008
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PROGRAM
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(PARI) A129629(Nmax=100)={ local( d=2*Nmax+3, b=Vec( sum( k=0, log(d)\log(2), (x^2^k)/(1-2*x^2^(k+1)), O(x^d)))); vector( Nmax, i, sumdiv(i*2-1, k, moebius((i*2-1)/k)*b[k])) } - M. F. Hasler (www.univ-ag.fr/~mhasler), May 03 2008
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CROSSREFS
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Adjacent sequences: A129626 A129627 A129628 this_sequence A129630 A129631 A129632
Sequence in context: A036892 A123707 A011947 this_sequence A089526 A079939 A106363
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KEYWORD
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nonn
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AUTHOR
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Ralf Stephan (ralf(AT)ark.in-berlin.de), May 31 2007
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