Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among pairs.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =12a(5) =14a(6) =28a(7) =36a(8) =52a(9) =58a(10) =116a(11) =124a(12) =242a(13) =266a(14) =302a(15) =356a(16) =664a(17) =695a(18) =1228a(19) =1311a(20) =1476a(21) =1589a(22) =2667a(23) =2766a(24) =3636a(25) =3898a(26) =4641a(27) =4924a(28) =7665a(29) =7764