A087310 Common differences of arithmetic progressions in A086786.

1, 2, 6, 6, 30, 4, 72, 72, 210, 132, 132, 114, 594, 48, 354, 1860, 3942, 2574, 2574, 2574, 20910, 20910, 9600, 9600

Offset: 2

Author

Amarnath Murthy, Sep 02 2003

Keywords

• nonn
• more

Crossrefs

Cf. A086786, A087308, A087309.

Formula

a(n) = A086786(n, 2) - A086786(n, 1) = (A087309(n) - A087308(n))/(n - 1).

Extensions

Edited and extended by David Wasserman, Jan 08 2006