A064493 List of distinct greatest common divisors of { k! and k! - (k-1)! + (k-2)! - ... + (-1)^k*0!, k = 0 .. n}.

1, 2, 4, 20, 260, 9620, 4454060

Offset

0,2

Comments

Records in the sequence gcd(k,A058006(k)). The record indices are products of primes from A064384. There are no further terms unless there are terms in A064384 larger than 463. - Max Alekseyev, Jul 06 2010

Links

Table of n, a(n) for n=0..6.

Crossrefs

Cf. A000142, A058006, A064383, A064384, A005165.

Sequence in context: A061348 A127103 A059831 * A145614 A145626 A228808

Adjacent sequences: A064490 A064491 A064492 * A064494 A064495 A064496

Keyword

hard,more,nonn

Author

Vladeta Jovovic, Oct 04 2001

Status

approved