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Search: id:A131328
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OFFSET
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0,2
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COMMENT
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a(n)/a(n-1) tends to phi. (Cf. A062114).
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FORMULA
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Row sums of triangle A131327. A131328 = A131326 + A052952 starting (0, 1, 1, 3, 4, 8, 12,...).
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EXAMPLE
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a(3) = 12 = sum of row 3 terms of A131327: (3 + 5 + 3 + 1).
a(3) = (9 + 3) since we add terms of A131326: (1, 3, 4, 9, 13,...) to A052952: (0, 1, 1, 3, 4,...), getting (9 + 3 ) = 12.
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CROSSREFS
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Cf. A062114, A052952, A131327, A131326, A131325, A131324.
Sequence in context: A115375 A103650 A131116 this_sequence A054451 A123102 A028272
Adjacent sequences: A131325 A131326 A131327 this_sequence A131329 A131330 A131331
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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), Jun 28 2007
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