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REFERENCES
| Bronstein-Semendjajew, Taschenbuch der Mathematik, 7th german ed. 1965, ch. 4.4.7
A. Fletcher, J. C. P. Miller, L. Rosenhead and L. J. Comrie, An Index of Mathematical Tables. Vols. 1 and 2, 2nd ed., Blackwell, Oxford and Addison-Wesley, Reading, MA, 1962, Vol. 1, p. 110.
E. L. Ince, Ordinary Differential Equations, Dover, NY, 1956; see p. 173.
J. Riordan, Combinatorial Identities, Wiley, 1968, p. 217.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
T. R. Van Oppolzer, Lehrbuch zur Bahnbestimmung der Kometen und Planeten, Vol. 2, Engelmann, Leipzig, 1880, p. 7.
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FORMULA
| (-1)^n*a(n) is the coefficient of x^1 in prod(k=0, 2*n, x+2*k-2*n). - Benoit Cloitre and Michael Somos, Nov 22, 2002.
E.g.f A(x)=arcsin(x)*sec(arcsin(x)). [From Kruchinin Vladimir (kru(AT)ie.tusur.ru), Sep 12 2010]
E.g.f.: arcsin(x)*sec(arcsin(x))=arcsin(x)/sqrt(1-x^2)=x/G(0); G(k)=2k*(x^2+1)+1-x^2*(2k+1)*(2k+2)/G(k+1) ; (continued fraction). - Sergei N. Gladkovskii, Nov 20 2011
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