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Search: id:A067175
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| A067175 |
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Number of digits in p#(n) (A002110) (i.e. primorial p(n), the n-th prime). |
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+0
2
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| 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; listen)
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OFFSET
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1,4
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MAPLE
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with(numtheory): it := 1: for n from 1 to 150 do it := it*ithprime(n): printf(`%d, `, ceil(log[10](it))) od:
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MATHEMATICA
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Table[ Floor[ Log[10, Product[ Prime[k], {k, 1, n} ]] + 1], {n, 1, 70} ]
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CROSSREFS
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Cf. A002110. Essentially the same as A048856.
Cf. A004216, A004218, A055642.
Sequence in context: A073518 A033104 A048856 this_sequence A049809 A011870 A087950
Adjacent sequences: A067172 A067173 A067174 this_sequence A067176 A067177 A067178
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KEYWORD
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base,nonn
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Feb 18 2002
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com) and James A. Sellers (sellersj(AT)math.psu.edu), Feb 19 2002
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