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Search: id:A045969
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A045969 a(1)=6; if n = Product p_i^e_i, n>1, then a(n) = Product p_{i+1}^e_i * Product p_{i+2}^e_i. +0
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6, 15, 35, 225, 77, 525, 143, 3375, 1225, 1155, 221, 7875, 323, 2145, 2695, 50625, 437, 18375, 667, 17325, 5005, 3315, 899, 118125, 5929, 4845, 42875, 32175, 1147, 40425, 1517, 759375, 7735, 6555, 11011, 275625, 1763, 10005, 11305, 259875, 2021, 75075 (list; graph; listen)
OFFSET

1,1

REFERENCES

From a puzzle proposed by Marc LeBrun (mlb(AT)well.com).

CROSSREFS

Sequence in context: A075625 A006094 A099620 this_sequence A100513 A127469 A103106

Adjacent sequences: A045966 A045967 A045968 this_sequence A045970 A045971 A045972

KEYWORD

easy,nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

More terms from David W. Wilson (davidwwilson(AT)comcast.net).

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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