A328319 - OEIS

A328319

Sum of digits when A328316(n) is written in primorial base; number of prime factors in A328316(1+n), counted with multiplicity.

0, 1, 1, 2, 1, 3, 3, 7, 21, 159, 12927, 132571335

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OFFSET

0,4

LINKS

FORMULA

a(n) = A001222(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)));

A276150(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:

A328319(n) = bigomega(A328316(1+n));

CROSSREFS

KEYWORD

nonn,more,hard

AUTHOR

STATUS

approved