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A067175 Number of digits in the n-th primorial (A002110). 2
1, 1, 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 15, 17, 18, 20, 22, 24, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 56, 58, 60, 62, 64, 66, 69, 71, 73, 76, 78, 80, 82, 85, 87, 89, 92, 94, 97, 99, 101, 104, 106, 109, 111, 113, 116, 118, 121, 123, 126, 128, 131, 133 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Soumyadeep Dhar, Table of n, a(n) for n = 0..5000

MAPLE

with(numtheory): it := 1: for n from 1 to 150 do it := it*ithprime(n): printf(`%d, `, ceil(log[10](it))) od:

MATHEMATICA

Table[Floor[Log[10, Product[Prime[k], {k, n}]] + 1], {n, 0, 67}]

PROG

(PARI) a(n) = 1 + logint(vecprod(primes(n)), 10) \\ Andrew Howroyd, Apr 24 2021

(Python)

from sympy import primorial

def a(n): return 1 if n == 0 else len(str(primorial(n)))

print([a(n) for n in range(68)]) # Michael S. Branicky, Apr 24 2021

CROSSREFS

Cf. A002110. Essentially the same as A048856.

Cf. A004216, A004218, A055642.

Sequence in context: A191325 A190209 A048856 * A225804 A049809 A190278

Adjacent sequences:  A067172 A067173 A067174 * A067176 A067177 A067178

KEYWORD

base,nonn

AUTHOR

Lekraj Beedassy, Feb 18 2002

EXTENSIONS

Edited and extended by Robert G. Wilson v and James A. Sellers, Feb 19 2002

Offset corrected by Arkadiusz Wesolowski, May 04 2013

STATUS

approved

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Last modified September 19 17:19 EDT 2021. Contains 347564 sequences. (Running on oeis4.)