1,2

Table of n, a(n) for n=1..67.

We have a(5) = 7 since 7! = 5040 and no smaller factorial number begins with 5 in base 10.

Apart from leading term, identical to A018799.

Sequence in context: A192599 A021081 A018799 * A077601 A090930 A258412

Adjacent sequences: A076216 A076217 A076218 * A076220 A076221 A076222

nonn,base

Lekraj Beedassy, Nov 04 2002

More terms from Lambert Klasen (lambert.klasen(AT)gmx.de), Jan 13 2005

approved