Search: id:A107669
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%I A107669
%S A107669 1,1,5,51,809,17575,486460,16384260,650574249,29762953831,1541719486081,
%T A107669 89201504309927,5702038255950404,399105271607867940,
%U A107669 30359621863987241460,2494052823831234355340,220067051126228849480649
%N A107669 a(n) = A107668(n)/(n+1)^2.
%o A107669 (PARI) {a(n)=local(A);if(n==0,n+1,A=(n+1)*x+x*O(x^n); for(k=0,n,A+=polcoeff(A,
               k)*x^k*(n+1-prod(i=0,k,1+(i-n-1)*x))); polcoeff(A,n)/(n+1)^2)}
%Y A107669 Cf. A107667, A107668, A107670.
%Y A107669 Sequence in context: A154886 A145162 A095839 this_sequence A077392 A111340 
               A124559
%Y A107669 Adjacent sequences: A107666 A107667 A107668 this_sequence A107670 A107671 
               A107672
%K A107669 nonn
%O A107669 0,3
%A A107669 Paul D. Hanna (pauldhanna(AT)juno.com), Jun 07 2005

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