a(1) = 1; a(2) = 3; for n > 2, a(n) is the smallest proper multiple of a(n-1) that contains a(n-2) as subsequence of its digits.

A372880

a(1) = 1; a(2) = 3; for n > 2, a(n) is the smallest proper multiple of a(n-1) that contains a(n-2) as subsequence of its digits.

Terms

    a(0) =1a(1) =3a(2) =12a(3) =36a(4) =612a(5) =1836a(6) =168912a(7) =10810368a(8) =16366897152

External references