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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
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2, 2, 2, 2, 3, 3, 3, 2, 2, 4, 2, 1, 3, 3, 2, 2, 3, 2, 2, 4, 3, 2, 4, 2, 2, 3, 3, 4, 4, 3, 2, 4, 3, 2, 5, 2, 2, 4, 1, 3, 3
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Interestingly, 23252729 is prime.
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EXAMPLE
| 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
| Sequence in context: A168557 A194320 A120425 * A184320 A092363 A133874
Adjacent sequences: A104183 A104184 A104185 * A104187 A104188 A104189
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KEYWORD
| nonn,base
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Apr 16 2005
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