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⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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E.g.f. S(x,y) = Integral C(x,y)*C(y,x) dx such that C(x,y)^2 - S(x,y)^2 = 1 and C(y,x) = 1 + Integral S(y,x)*C(x,y) dy, where S(x,y) = Sum_{n>=0} Sum_{k=0..n} T(n,k) * x^(2*n+1-2*k)*y^(2*k)/((2*n+1-2*k)!*(2*k)!), as a triangle of coefficients T(n,k) read by rows.
#62 by Paul D. Hanna at Tue Nov 21 09:36:56 EST 2023
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#61 by Paul D. Hanna at Tue Nov 21 09:36:52 EST 2023
COMMENTS
CROSSREFS
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#60 by Paul D. Hanna at Wed Apr 03 21:59:36 EDT 2019
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#59 by Paul D. Hanna at Wed Apr 03 21:59:33 EDT 2019
CROSSREFS
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#58 by Paul D. Hanna at Sat Mar 09 15:12:54 EST 2019
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#57 by Paul D. Hanna at Sat Mar 09 15:12:52 EST 2019
CROSSREFS
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#56 by Paul D. Hanna at Wed Mar 06 12:49:49 EST 2019
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#55 by Paul D. Hanna at Wed Mar 06 12:49:46 EST 2019
FORMULA
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#54 by Paul D. Hanna at Mon Mar 04 15:08:15 EST 2019
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#53 by Paul D. Hanna at Mon Mar 04 15:08:12 EST 2019
FORMULA
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