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A131438
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(2+n)*2^n-2-3*n.
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3
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1, 8, 29, 82, 207, 492, 1129, 2534, 5603, 12256, 26589, 57306, 122839, 262100, 557009, 1179598, 2490315, 5242824, 11009989, 23068610, 48234431, 100663228, 209715129, 436207542, 905969587
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Row sums of triangle A131437.
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (6,-13,12,-4).
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FORMULA
| Binomial transform of A131439.
G.f.: -x*(-1-2*x+6*x^2) / ( (2*x-1)^2*(x-1)^2 ). - R. J. Mathar, Sep 24 2011
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EXAMPLE
| a(3) = 19 = sum of row 3 terms of triangle A131437: (7 + 9 + 13).
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CROSSREFS
| Cf. A131436, A131437, A131439.
Sequence in context: A028419 A046664 A055536 * A048478 A001360 A116952
Adjacent sequences: A131435 A131436 A131437 * A131439 A131440 A131441
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KEYWORD
| nonn,easy
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 11 2007
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EXTENSIONS
| Definition replaced by formula. - R. J. Mathar, Sep 24 2011
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