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Search: id:A132479
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OFFSET
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0,2
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FORMULA
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a(0) = 1, a(2) = 5, a(n) = 2^(n+2) for n>1.
G.f.: -(1+3*x+6*x^2)/(-1+2*x). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007
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EXAMPLE
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a(3) = 32 = sum of row 3 terms of triangle A132478: (4 + 9 + 18 + 1).
a(3) = 32 = 2^5.
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CROSSREFS
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Cf. A132478.
Sequence in context: A063290 A134594 A063076 this_sequence A045944 A038361 A131425
Adjacent sequences: A132476 A132477 A132478 this_sequence A132480 A132481 A132482
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KEYWORD
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nonn
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 23 2007
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