Search: id:A117174
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%I A117174
%S A117174 1,2,3,4,5,7,7,9,11,13,12,17,15,21,23,23,22,31,27,37,36,38,36,49,43,52,
%T A117174 54,60,54,74,58,74,74,82,83,97,77,100,104,115,100,132,107,138,137,136,
%U A117174 130,165,140,174,165,182,166,215,189,217,200,216,207,265,208,260,266
%N A117174 Row sums of triangle A117170 of Inverse-Shift-Moebius coefficients and 
               so equals the Inverse-Shift-Moebius transform of [1,1,1,...].
%o A117174 (PARI) {a(n)=if(n<1,0,sum(k=1,n,prod(i=0,n, matrix(n,n,r,c,if(r>=c,if((r+i)%(c+i)==0,
               1,0))))[n,k]))}
%Y A117174 Cf. A117170 (triangle), A117171 (column 1), A117172 (column 2), A117173 
               (column 3).
%Y A117174 Sequence in context: A114707 A000015 A122411 this_sequence A022473 A082352 
               A122320
%Y A117174 Adjacent sequences: A117171 A117172 A117173 this_sequence A117175 A117176 
               A117177
%K A117174 nonn
%O A117174 1,2
%A A117174 Wouter Meeussen (wouter.meeussen(AT)pandora.be) and Paul D. Hanna (pauldhanna(AT)juno.com), 
               Mar 05 2006

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