a(0) = 1; for n > 0, a(n) is the smallest triangular number which is a (proper) multiple of a(n-1).

A068776

a(0) = 1; for n > 0, a(n) is the smallest triangular number which is a (proper) multiple of a(n-1).

Terms

    a(0) =1a(1) =3a(2) =6a(3) =36a(4) =2016a(5) =1493856a(6) =579616128

External references