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Search: id:A140788
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| 8, 26, 98, 386, 1538, 6146, 24578, 98306, 393218, 1572866, 6291458, 25165826, 100663298, 402653186, 1610612738, 6442450946, 25769803778, 103079215106, 412316860418, 1649267441666, 6597069766658, 26388279066626
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OFFSET
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0,1
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COMMENT
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Also 2*A140660.
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FORMULA
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a(n)=5*a(n-1)-4*a(n-2). G.f.: 2(4-7x)/((1-x)(1-4x)). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009]
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CROSSREFS
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Sequence in context: A088024 A051669 A027004 this_sequence A082573 A112645 A089064
Adjacent sequences: A140785 A140786 A140787 this_sequence A140789 A140790 A140791
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KEYWORD
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nonn
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Jul 14 2008
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009
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