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A107391
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Expansion of e.g.f. sin(x)^2 * sinh(x)^2.
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0
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24, -896, 67584, -4161536, 268959744, -17171480576, 1099645845504, -70366596694016, 4503633987108864, -288229826395897856, 18446752869802573824, -1180591479979922948096, 75557865977714137104384
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OFFSET
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1,1
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COMMENTS
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The sequence contains each 4th term of the e.g.f. sin(x)^2*sinh(x)^2 = (24/4!)*x^4 - (896/8!)*x^8 + (67584/12!)*x^12 + ... - R. J. Mathar, Dec 17 2017
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LINKS
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FORMULA
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G.f.: 8*x*(3+32*x)/((1-16*x)*(1+64*x)).
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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