Search: id:A111561
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%I A111561
%S A111561 0,2,7,44,354,3328,35144,407984,5137824,69566144,1006372864,15481560064,
%T A111561 252326173824,4344015683584,78793242566144,1502374856981504,
%U A111561 30052439647908864,629485600310349824,13783057303819485184
%N A111561 Column 1 of A111560, which is the matrix log of A111553.
%o A111561 (PARI) {a(n)=local(M=matrix(n+2,n+2,m,j,if(m==j,1,if(m==j+1,-m+1, -(m-j-1)*polcoeff(log(sum(i=0,
               m,(i+3)!/3!*x^i)),m-j-1))))); if(n<0,0,sum(i=1,#M,(M^0-M)^i/i)[n+2,
               2])}
%Y A111561 Cf. A111560, A111553.
%Y A111561 Sequence in context: A041507 A158107 A145073 this_sequence A000155 A077045 
               A128579
%Y A111561 Adjacent sequences: A111558 A111559 A111560 this_sequence A111562 A111563 
               A111564
%K A111561 nonn
%O A111561 0,2
%A A111561 Paul D. Hanna (pauldhanna(AT)juno.com), Aug 07 2005

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