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Search: id:A144454
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| 0, 1, 8, 5, 8, 35, 16, 7, 80, 11, 40, 143, 56, 65, 224, 85, 32, 323, 40, 133, 440, 161, 176, 575, 208, 75, 728, 87, 280, 899, 320, 341, 1088, 385, 136, 1295, 152, 481, 1520, 533, 560, 1763, 616, 215, 2024, 235, 736, 2303, 800, 833, 2600, 901, 312, 2915, 336, 1045
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OFFSET
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1,3
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COMMENT
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Numerators of (n-1)(n+1)/(9n^2).
Terms alternate between even and odd. The sequence modulo 9 reads 0,1,8,5,8,8,7,7,8,2,4,8,2,2,8,4,5,... (Is there a meaning to the interpretation as the constant 0.1858877824822845...?) The first appearance of 3 (mod 9) is at a(26)=75, the second at a(55)=336. The first appearance of 6 (mod 9) is at a(28)=87, the second at a(53)=312.
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FORMULA
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a(n)=A061039(3n).
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CROSSREFS
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Sequence in context: A086235 A157742 A021542 this_sequence A074071 A100126 A132036
Adjacent sequences: A144451 A144452 A144453 this_sequence A144455 A144456 A144457
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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), Oct 07 2008
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EXTENSIONS
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Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 24 2008
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