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A167477
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Expansion of (1-3x+5x^2-x^3)/(1-3x+x^2)^2.
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2
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1, 3, 12, 44, 149, 479, 1487, 4503, 13386, 39226, 113641, 326173, 928957, 2628459, 7395624, 20708264, 57739517, 160391483, 444068171, 1225831551, 3374848806, 9268963318, 25401364177, 69472849849, 189661024249, 516904018899
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OFFSET
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0,2
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COMMENTS
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Hankel transform of A033297 (when this starts 1,1,4,...).
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LINKS
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G. C. Greubel, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (6,-11,6,-1).
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FORMULA
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a(n) = 4*A001871(n-1) - A001871(n) + A001519(n+2). - R. J. Mathar, Jun 28 2011
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MATHEMATICA
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LinearRecurrence[{6, -11, 6, -1}, {1, 3, 12, 44}, 100] (* G. C. Greubel, Jun 13 2016 *)
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CROSSREFS
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Sequence in context: A290918 A012873 A282082 * A190051 A220633 A296225
Adjacent sequences: A167474 A167475 A167476 * A167478 A167479 A167480
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry, Nov 04 2009
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STATUS
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approved
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