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A362407
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Numerators of the expansion of the series reversion of sin(x) + x, odd powers only.
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1
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1, 1, 1, 43, 223, 60623, 764783, 107351407, 2499928867, 596767688063, 22200786516383, 64470807442488761, 3504534741776035061, 3597207408242668198973, 268918457620309807441853, 185388032403184965693274807, 18241991360742724891839902347
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OFFSET
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0,4
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LINKS
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FORMULA
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Conjecture: a(n) = abs(A302977(n)).
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EXAMPLE
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f^-1(x) = (1/2)*x + (1/96)*x^3 + (1/1920)*x^5 + (43/1290240)*x^7 + ...
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PROG
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(PARI) a(n) = numerator(polcoef(serreverse(sin(x + O(x^(2*n))) + x), 2*n-1)) \\ Andrew Howroyd, Apr 18 2023
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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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