A327724 Product of A003059 and A071797.

1, 2, 4, 6, 3, 6, 9, 12, 15, 4, 8, 12, 16, 20, 24, 28, 5, 10, 15, 20, 25, 30, 35, 40, 45, 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 9, 18, 27, 36, 45, 54

Offset: 1

Author

Todor Szimeonov, Sep 23 2019

Keywords

• nonn

Crossrefs

Cf. A003059, A071797.

Programs

PARI

a(n) = {(1+sqrtint(n-1))*(n-sqrtint(n-1)^2)} \\ Andrew Howroyd, Sep 23 2019