Least common multiple of 5*n+1 and 5*n-1.

Terms

a(0) =1a(1) =12a(2) =99a(3) =112a(4) =399a(5) =312a(6) =899a(7) =612a(8) =1599a(9) =1012a(10) =2499a(11) =1512a(12) =3599a(13) =2112a(14) =4899a(15) =2812a(16) =6399a(17) =3612a(18) =8099a(19) =4512a(20) =9999a(21) =5512a(22) =12099a(23) =6612a(24) =14399a(25) =7812a(26) =16899a(27) =9112a(28) =19599a(29) =10512