Central element of a series of 7 successive nonsquarefree numbers.

Terms

a(0) =217073a(1) =671349a(2) =826827a(3) =1092750a(4) =1092751a(5) =1427373a(6) =2097051a(7) =2779373a(8) =3112822a(9) =3306447a(10) =3597726a(11) =3994823a(12) =4063777a(13) =4442877a(14) =4630547a(15) =4842477a(16) =5436378a(17) =5479622a(18) =5610647a(19) =5634125a(20) =6315022a(21) =6474223a(22) =6626322a(23) =6677867a(24) =7128474a(25) =7216621a(26) =7216622a(27) =7295451a(28) =7507926