OFFSET
0,5
MATHEMATICA
Table[Length[Select[IntegerDigits[Product[Floor[(5i-1)/4], {i, n}]], Positive]], {n, 0, 68}]
PROG
(Python)
from math import prod
def a(n): s = str(prod((5*k-1)//4 for k in range(1, n+1))); return len(s) - s.count("0")
print([a(n) for n in range(69)]) # Michael S. Branicky, Sep 01 2022
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Stefano Spezia, Sep 01 2022
STATUS
approved