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Search: id:A104186
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| A104186 |
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Number of distinct prime divisors of numbers from four consecutive concatenated odd numbers. |
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+0
1
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| 2, 2, 2, 2, 3, 3, 3, 2, 2, 4, 2, 1, 3, 3, 2
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Interestingly, 23252729 is prime.
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EXAMPLE
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The number of distinct prime factors of 1357 is 2 - the first term in the sequence.
The number of distinct prime factors of 3579 is 2 - the second term in the sequence.
The number of distinct prime factors of 57911 is 2 - the third term in the sequence.
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CROSSREFS
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Sequence in context: A115263 A055894 A120425 this_sequence A092363 A133874 A053384
Adjacent sequences: A104183 A104184 A104185 this_sequence A104187 A104188 A104189
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KEYWORD
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nonn,base
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Apr 16 2005
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