A383218 The product of the first n terms of A383217.

1, 2, 6, 24, 120, 720, 5760, 51840, 518400, 5702400, 68428800, 889574400, 12454041600, 186810624000, 2988969984000, 50812489728000, 914624815104000, 17377871486976000, 347557429739520000, 7298706024529920000, 160571532539658240000, 3693145248412139520000

Offset: 1

Author

Dominic McCarty, Apr 19 2025

Keywords

• nonn
• base

Links

• Dominic McCarty, Table of n, a(n) for n = 1..429

Crossrefs

Cf. A383217, A033180.

Programs

Python

from itertools import count
a, p = [1], 1
for k in count(2):
    if str(k) not in str(p): p *= k; a.append(p)
    if len(a) >= 20: break
print(a)