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A192308
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1-sequence of reduction of (3n) by x^2 -> x+1.
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1
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0, 6, 15, 39, 84, 174, 342, 654, 1221, 2241, 4056, 7260, 12876, 22662, 39627, 68907, 119244, 205482, 352770, 603630, 1029825, 1752261, 2974320, 5037624, 8515224, 14367174, 24200007, 40699119, 68348676, 114629286
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OFFSET
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1,2
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COMMENTS
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See A192232 for definition of "k-sequence of reduction of [sequence] by [substitution]".
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LINKS
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FORMULA
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G.f.: 3*x^2*(2-x)/(1-x)/(1-x-x^2)^2. [Colin Barker, Feb 11 2012]
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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