Number of ordered 5-tuples of integers from [ 1..n ] with no global factor.

Terms

a(0) =1a(1) =5a(2) =19a(3) =49a(4) =118a(5) =225a(6) =434a(7) =729a(8) =1209a(9) =1850a(10) =2850a(11) =4059a(12) =5878a(13) =8044a(14) =11020a(15) =14566a(16) =19410a(17) =24789a(18) =32103a(19) =40213a(20) =50615a(21) =62260a(22) =77209a(23) =93099a(24) =113504a(25) =135431a(26) =162341a(27) =191396a(28) =227355a(29) =264463