Denominator of sum of all elements M(i,j,k) = i*j/k, (i,j,k = 1..n). a(n) = Denominator[Sum[Sum[Sum[i*j/k,{i,1,n}],{j,1,n}],{k,1,n}]].
A099866
Denominator of sum of all elements M(i,j,k) = i*j/k, (i,j,k = 1..n). a(n) = Denominator[Sum[Sum[Sum[i*j/k,{i,1,n}],{j,1,n}],{k,1,n}]].
Terms
- a(0) =1a(1) =2a(2) =1a(3) =3a(4) =4a(5) =20a(6) =5a(7) =35a(8) =56a(9) =504a(10) =70a(11) =770a(12) =3960a(13) =1144a(14) =1001a(15) =45045a(16) =80080a(17) =1361360a(18) =204204a(19) =184756a(20) =67184a(21) =470288a(22) =323323a(23) =7436429a(24) =27457584a(25) =228813200a(26) =106234700a(27) =2868336900a(28) =356948592a(29) =10351509168
External references
- oeis: A099866