The primality of a(4)! was established by Andrey V. Kulsha and Peter Liaskovsky (ALTAIR(AT)tut.by).
a(7) > 30000. [From Donovan Johnson, Mar 29 2010]
Table of n, a(n) for n=1..6.
Sequence in context: A306114 A044181 A044562 * A141958 A141990 A253952
Adjacent sequences: A060320 A060321 A060322 * A060324 A060325 A060326
G. L. Honaker, Jr., Mar 29 2001
a(5)-a(6) from Donovan Johnson, Mar 29 2010