Number of ordered 5-tuples of integers from [ 2,n ] with no common factors among triples.

Terms

a(0) =0a(1) =0a(2) =0a(3) =8a(4) =10a(5) =51a(6) =83a(7) =165a(8) =216a(9) =531a(10) =637a(11) =1284a(12) =1607a(13) =2159a(14) =2756a(15) =4705a(16) =5353a(17) =8462a(18) =9829a(19) =12378a(20) =14514a(21) =21227a(22) =23433a(23) =31079a(24) =35600a(25) =43705a(26) =49266a(27) =66390a(28) =70849a(29) =93223