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)^(-9).

Terms

a(0) =1a(1) =5778a(2) =40169a(3) =87727a(4) =136338a(5) =184958a(6) =233578a(7) =282198a(8) =330818a(9) =379438a(10) =428058a(11) =476678a(12) =525298a(13) =573918a(14) =622538a(15) =671158a(16) =719778a(17) =768398a(18) =817018a(19) =865638a(20) =914258a(21) =962878a(22) =1011498a(23) =1060118a(24) =1108738a(25) =1157358a(26) =1205978a(27) =1254598a(28) =1303218a(29) =1351838