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Search: id:A134479
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| 1, 3, 9, 18, 30, 45, 63, 84, 108, 135, 165, 198, 234, 273
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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Binomial transform of [1, 2, 4, -1, 1, -1, 1,...].
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EXAMPLE
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a(3) = 18 = (1, 3, 3, 1) dot (1, 2, 4, -1) = (1 + 6 + 12 -1).
a(3) = 18 = sum of row 3 terms of triangle A134478: (3 = 4 + 5 + 6).
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CROSSREFS
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Cf. A134479.
Sequence in context: A103312 A159794 A100967 this_sequence A045943 A127759 A064843
Adjacent sequences: A134476 A134477 A134478 this_sequence A134480 A134481 A134482
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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), Oct 27 2007
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