%I A114360
%S A114360 1,2207,12389,25147,38017,50887,63757,76627,89497,102367,115237,128107,
%T A114360 140977,153847,166717,179587,192457,205327,218197,231067,243937,256807,
%U A114360 269677,282547,295417,308287,321157,334027,346897,359767,372637,385507
%N A114360 Let M(n) be the n X n matrix m(i,j)=min(i,j) for 1<=i,j<=n then a(n) 
               is the trace of M(n)^(-8).
%C A114360 More generally for any n>=floor((m+1)/2) the trace of M(n)^(-m) = binomial(2*m,
               m)*n-2^(2*m-1)+binomial(2*m-1,m)
%F A114360 a(1)=1 a(2)=2207 a(3)=12389 then for n>=4 a(n)=12870n-26333
%Y A114360 Sequence in context: A004951 A004971 A037210 this_sequence A023319 A043659 
               A031772
%Y A114360 Adjacent sequences: A114357 A114358 A114359 this_sequence A114361 A114362 
               A114363
%K A114360 nonn
%O A114360 1,2
%A A114360 Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 09 2006