Search: id:A080243
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%I A080243
%S A080243 1,1,3,11,45,197,903,4279,20793,103049,518859,2646723,13648869,71039373,
%T A080243 372693519,1968801519,10463578353,55909013009,300159426963,
%U A080243 1618362158587,8759309660445
%V A080243 1,-1,3,-11,45,-197,903,-4279,20793,-103049,518859,-2646723,13648869,-71039373,
%W A080243 372693519,-1968801519,10463578353,-55909013009,300159426963,-1618362158587,
%X A080243 8759309660445
%N A080243 Signed super-Catalan or little Schroeder numbers.
%C A080243 Row sums of triangle A080245
%D A080243 I. P. Goulden and D. M. Jackson, Combinatorial Enumeration, Wiley, N.Y., 
               1983, Exercise 2.7.12.(b).
%F A080243 G.f.: (-1+x+sqrt(1+6*x+x^2))/x/4. - Vladeta Jovovic (vladeta(AT)eunet.rs), 
               Sep 27 2003
%Y A080243 Cf. A001003, A080245.
%Y A080243 Sequence in context: A049160 A146086 A049177 this_sequence A001003 A151131 
               A151132
%Y A080243 Adjacent sequences: A080240 A080241 A080242 this_sequence A080244 A080245 
               A080246
%K A080243 sign
%O A080243 0,3
%A A080243 Paul Barry (pbarry(AT)wit.ie), Feb 13 2003

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