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Search: id:A136353
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| A136353 |
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Odd composite N with k consecutive prime factors preceded by prime N-2. |
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+0
2
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OFFSET
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1,1
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COMMENT
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This sequence is different from A070826 and/or A118750
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FORMULA
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Compute the product of k consecutive sequences of prime factors 3,5,7,11,etc. where k=1,2,3,4,5,etc. Where odd composite N is preceded by prime N-2 add N to the sequence.
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EXAMPLE
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a(1)=9 because k=1 with prime factor 3 and N-2=7, prime
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CROSSREFS
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Cf. A136349-A136352 A136354-A136358 A070826 A118750.
Adjacent sequences: A136350 A136351 A136352 this_sequence A136354 A136355 A136356
Sequence in context: A100663 A152219 A029712 this_sequence A136354 A098146 A124274
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KEYWORD
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easy,more,nonn,uned
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AUTHOR
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Enoch Haga (Enokh(AT)comcast.net), Dec 25 2007
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