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Search: id:A055546
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| -1, 2, -16, 288, -9216, 460800, -33177600, 3251404800, -416179814400, 67421129932800, -13484225986560000, 3263182688747520000, -939796614359285760000, 317651255653438586880000
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OFFSET
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0,2
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COMMENT
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Coefficient of the Cayley-Menger determinant of order n.
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REFERENCES
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A. L. Mackay, On the regular heptagon, J. Math. Chemistry, vol. 21, 1997, 197-209.
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LINKS
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Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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FORMULA
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E.g.f.: -arcsinh(x/sqrt(2))^2. - Vladeta Jovovic (vladeta(AT)eunet.rs), Aug 30 2004
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MATHEMATICA
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Table[(-1)^(n+1)2^n n!^2, {n, 0, 20}]
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CROSSREFS
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Sequence in context: A102599 A123744 A136796 this_sequence A009549 A009795 A112722
Adjacent sequences: A055543 A055544 A055545 this_sequence A055547 A055548 A055549
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KEYWORD
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sign
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com)
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