Search: id:A107948
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%I A107948
%S A107948 1,1,2,5,16,68,399,3348,41417,775234,22445788,1024347395,74876701760,
%T A107948 8888457145166,1734062627778860
%N A107948 Terms at positions 2^n of A107946 for n>=0.
%F A107948 a(n) = A107946(2^n).
%o A107948 (PARI) {a(n)=local(A=[1,1],B=[1]);for(i=1,n-1, B=concat(B,vector(#B,k,
               polcoeff(Ser(A)/(1-x),#B+k-1))); A=concat(A,B););A[2^(n-1)]}
%Y A107948 Cf. A107946, A107947.
%Y A107948 Sequence in context: A006116 A122082 A002631 this_sequence A058673 A059295 
               A129092
%Y A107948 Adjacent sequences: A107945 A107946 A107947 this_sequence A107949 A107950 
               A107951
%K A107948 nonn
%O A107948 0,3
%A A107948 Paul D. Hanna (pauldhanna(AT)juno.com), May 28 2005

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