Numbers k with squarefree kernel 210 such that both k-1 and k+1 are prime.

Terms

a(0) =420a(1) =1050a(2) =3360a(3) =5880a(4) =6300a(5) =7350a(6) =7560a(7) =8820a(8) =10500a(9) =26250a(10) =26880a(11) =28350a(12) =29400a(13) =30870a(14) =33600a(15) =35280a(16) =100800a(17) =102060a(18) =131250a(19) =134400a(20) =158760a(21) =170100a(22) =241920a(23) =264600a(24) =282240a(25) =294000a(26) =370440a(27) =420000a(28) =453600a(29) =525000