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Search: id:A110678
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| A110678 |
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an example of the sequence of the difference of pronics. this is analogous to the difference of squares. start at a pronic and subtract all of the pronics up to and including the pronic. |
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+0
1
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OFFSET
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0,1
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COMMENT
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this is useful in finding prime numbers. as one varies the initial pronic all the even numbers are generated.
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FORMULA
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pr(j)=pr(i)- pr(k), k= 0, 1, 2, ..., i
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EXAMPLE
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pr(3)= 60 when pr(i)= 72 pr(0)= 0, pr(1)= 2, pr(2)= 6, pr(3)= 12... pr(i)= 72.
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CROSSREFS
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Sequence in context: A036187 A035879 A033392 this_sequence A008943 A003898 A133899
Adjacent sequences: A110675 A110676 A110677 this_sequence A110679 A110680 A110681
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KEYWORD
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easy,nonn
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AUTHOR
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Stuart M. Ellerstein (ellerstein(AT)aol.com), Sep 14 2005
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