Numerator of sum of all elements M(i,j,k) = i*j/k, (i,j,k = 1..n). a(n) = Numerator[Sum[Sum[Sum[i*j/k,{i,1,n}],{j,1,n}],{k,1,n}]].
A099865
Numerator of sum of all elements M(i,j,k) = i*j/k, (i,j,k = 1..n). a(n) = Numerator[Sum[Sum[Sum[i*j/k,{i,1,n}],{j,1,n}],{k,1,n}]].
Terms
- a(0) =1a(1) =27a(2) =66a(3) =625a(4) =2055a(5) =21609a(6) =10164a(7) =123282a(8) =320805a(9) =4465505a(10) =920821a(11) =14537549a(12) =104285363a(13) =41010655a(14) =47830280a(15) =2816662204a(16) =6447760119a(17) =139131611847a(18) =26153100905a(19) =29313445875a(20) =13068630729a(21) =111103313343a(22) =91973556693
External references
- oeis: A099865