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Search: id:A132123
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| A132123 |
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n * (2*n + 1) * (6*n^2 + 4*n + 1) / 3. |
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+0
2
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| 0, 11, 110, 469, 1356, 3135, 6266, 11305, 18904, 29811, 44870, 65021, 91300, 124839, 166866, 218705, 281776, 357595, 447774, 554021, 678140, 822031, 987690, 1177209, 1392776, 1636675, 1911286, 2219085, 2562644, 2944631, 3367810, 3835041
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Central terms of the triangle in A132121.
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FORMULA
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G.f.=x(11+55x+29x^2+x^3)/(1-x)^5. - Emeric Deutsch (deutsch(AT)duke.poly.edu), Aug 19 2007
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MAPLE
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seq((1/3)*n*(2*n+1)*(6*n^2+4*n+1), n=0..32); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Aug 19 2007
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CROSSREFS
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Adjacent sequences: A132120 A132121 A132122 this_sequence A132124 A132125 A132126
Sequence in context: A094703 A103542 A044343 this_sequence A115822 A097784 A121031
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 12 2007
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