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 A212371 Self-convolution yields A212370. 1
 1, 1, 7, 110, 2875, 109683, 5678706, 380631612, 31942104109, 3272150145947, 401101904099311, 57890233456712428, 9706532459502104648, 1869487973632573739154, 409621529316840179292622, 101253590975320030584465534, 28030292175164530782257192631 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS A212370 satisfies: 1 = Sum_{n>=0} A212370(n)*x^n*[Sum_{k=0..n+1} binomial(n+1, k)^2*(-x)^k]^2. LINKS EXAMPLE G.f.: A(x) = 1 + x + 7*x^2 + 110*x^3 + 2875*x^4 + 109683*x^5 +... such that A(x)^2 = 1 + 2*x + 15*x^2 + 234*x^3 + 6019*x^4 + 226656*x^5 +...+ A212370(n)*x^n +... CROSSREFS Cf. A212370. Sequence in context: A303109 A101924 A171193 * A112463 A009471 A301990 Adjacent sequences:  A212368 A212369 A212370 * A212372 A212373 A212374 KEYWORD nonn AUTHOR Paul D. Hanna, May 10 2012 STATUS approved

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Last modified January 20 02:13 EST 2019. Contains 319320 sequences. (Running on oeis4.)