Search: id:A138292
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%I A138292
%S A138292 1,1,1,7,25,121,841,9871,80977,869905,10776241,131366071,1821918121,
%T A138292 27671299657,460068491065,8716820294911,162728020119841,
%U A138292 3217989767498401,69343322972016097,1533322325194196455
%N A138292 E.g.f. satisfies: A(x) = exp(x*A(x^2)).
%C A138292 E.g.f: A(x) = 1 + x + 1/2*x^2 + 7/6*x^3 + 25/24*x^4 + 121/120*x^5 +...
%C A138292 Log(A(x)) = x + x^3 + 1/2*x^5 + 7/6*x^7 + 25/24*x^9 + 121/120*x^11 +...
%o A138292 (PARI) {a(n)=local(A=1); for(i=0,n-1,A=exp(x*subst(A,x,x^2+x*O(x^n))));
               n!*polcoeff(A,n)}
%Y A138292 Sequence in context: A110240 A129791 A141626 this_sequence A138738 A057573 
               A082651
%Y A138292 Adjacent sequences: A138289 A138290 A138291 this_sequence A138293 A138294 
               A138295
%K A138292 nonn
%O A138292 0,4
%A A138292 Paul D. Hanna (pauldhanna(AT)juno.com), Mar 13 2008

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