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A328318
Number of nonzero digits in representation of A328316(n) in primorial base; Number of distinct prime factors in A328316(1+n).
5
0, 1, 1, 2, 1, 2, 1, 3, 5, 16, 104, 7447
OFFSET
0,4
FORMULA
a(n) = A267263(A328316(n)).
a(n) = A001221(A328316(1+n)).
PROG
(PARI)
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
A328316(n) = if(!n, 0, A276086(A328316(n-1)));
A267263(n) = { my(s=0, p=2, d); while(n, d = (n%p); s += !!d; n = (n-d)/p; p = nextprime(1+p)); (s); };
\\ Or alternatively, more slowly as:
A328318(n) = omega(A328316(1+n));
CROSSREFS
KEYWORD
nonn,base,hard,more
AUTHOR
Antti Karttunen, Oct 14 2019
STATUS
approved