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Search: id:A125176
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| 1, 3, 7, 14, 28, 56, 112, 224, 448, 896, 1792, 3584, 7168, 14336, 28672, 57344, 114688, 229376, 458752, 917504, 1835008, 3670016, 7340032, 14680064, 29360128, 58720256, 117440512, 234881024, 469762048, 939524096, 1879048192, 3758096384, 7516192768, 15032385536
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OFFSET
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1,2
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FORMULA
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a(1) = 1, a(2) = 3, a(n), n>2 = 7*2^(n-3); row sums of A125175.
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EXAMPLE
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a(6) = 7*8 = 7*2^3. First few rows of A125175 are (1; 1,2; 1,3,3; 1,4,5,4;...). a(4) = 14 = (1 + 4 + 5 + 4).
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CROSSREFS
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Cf. A125175. Essentially identical to A005009.
Adjacent sequences: A125173 A125174 A125175 this_sequence A125177 A125178 A125179
Sequence in context: A018084 A088209 A089074 this_sequence A125899 A052997 A074988
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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), Nov 22 2006
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EXTENSIONS
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More terms from njas, Dec 15 2007
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