OFFSET
1,2
COMMENTS
LINKS
EXAMPLE
The first terms, alongside the factorial base expansion of their inverse, are:
n a(n) 1/a(n) in factorial base
-- ------- ------------------------
1 1 1
2 2 0.1
3 6 0.0 1
4 20 0.0 0 1 1
5 24 0.0 0 1
6 120 0.0 0 0 1
7 630 0.0 0 0 0 1 1
8 720 0.0 0 0 0 1
9 4480 0.0 0 0 0 0 1 1
10 5040 0.0 0 0 0 0 1
11 36288 0.0 0 0 0 0 0 1 1
12 40320 0.0 0 0 0 0 0 1
13 362880 0.0 0 0 0 0 0 0 1
14 3326400 0.0 0 0 0 0 0 0 0 1 1
15 3628800 0.0 0 0 0 0 0 0 0 1
PROG
(PARI) is(n) = my (f=1/n); for (r=2, oo, if (f==0, return (1), floor(f)>1, return (0), f=frac(f)*r))
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Rémy Sigrist, Apr 17 2021
STATUS
approved