Triangular numbers such that the three numbers before it and the three numbers after it are squarefree.

A374393

Triangular numbers such that the three numbers before it and the three numbers after it are squarefree.

Terms

    a(0) =36a(1) =2016a(2) =2556a(3) =3240a(4) =9180a(5) =10296a(6) =23220a(7) =23436a(8) =25200a(9) =39060a(10) =41616a(11) =67896a(12) =93096a(13) =97020a(14) =122760a(15) =126756a(16) =170820a(17) =215496a(18) =253116a(19) =313236a(20) =320400a(21) =365940a(22) =437580a(23) =438516a(24) =446040a(25) =499500a(26) =508536a(27) =574056a(28) =592416a(29) =653796

External references