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A225697
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Numerators of mass formula for vacuum graphs for a phi^4 field theory.
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7
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1, 1, 35, 385, 25025, 1616615, 260275015, 929553625, 835668708875, 321732452916875, 30950661970603375, 4960547004924886375, 1165728546157348298125, 74696298380697779410625, 31105672825676289568853125, 6973891847516624121336870625, 2977851818889598499810843756875
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OFFSET
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0,3
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LINKS
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EXAMPLE
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1, 1/8, 35/384, 385/3072, 25025/98304, 1616615/2359296, 260275015/113246208,
929553625/100663296, 835668708875/19327352832, 321732452916875/1391569403904,
30950661970603375/22265110462464, 4960547004924886375/534362651099136, ...
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MATHEMATICA
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V[n_] := (4 n - 1)!!/(4!^n n!);
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CROSSREFS
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KEYWORD
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nonn,frac
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AUTHOR
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STATUS
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approved
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