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Search: id:A133239
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| A133239 |
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Dimensions of certain Lie algebra (see reference for precise definition). |
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+0
2
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| 1, 78, 2430, 43758, 537966, 4969107, 36685506, 225961450, 1198006524, 5597569328, 23474156784, 89644484592, 315415779120, 1032380107812, 3168537039954, 9180278955210, 25252641533405, 66272502260250, 166635797864250, 402908157902250, 939815697512250
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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J. M. Landsberg and L. Manivel, The sextonions and E7 1/2, Adv. Math. 201 (2006), 143-179. [Th. 7.1, case a=2]
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MAPLE
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b:=binomial; t71:= proc(a, k) ((3*a+2*k+5)/(3*a+5)) * b(k+2*a+3, k)*b(k+5*a/2+3, k)*b(k+3*a+4, k)/(b(k+a/2+1, k)*b(k+a+1, k)); end; [seq(t71(2, k), k=0..30)];
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CROSSREFS
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Sequence in context: A027786 A036524 A140934 this_sequence A146479 A017794 A035734
Adjacent sequences: A133236 A133237 A133238 this_sequence A133240 A133241 A133242
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Oct 15 2007
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