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Search: id:A033869
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A033869 n is even number, (D^2+D)/2=A ( D is the sum of even divisors of n )<[ square root of n ]<( A is the sum of odd divisors of n ). +0
1
2, 4, 6, 54, 130, 238, 486, 754, 810, 1258, 1558, 3538, 4374, 6402, 6790, 7654, 8814, 9118, 11554, 14130, 18358, 21754, 21970, 26634, 29722, 32218, 38218 (list; graph; listen)
OFFSET

0,1

CROSSREFS

Sequence in context: A056696 A045662 A084324 this_sequence A066220 A009257 A098757

Adjacent sequences: A033866 A033867 A033868 this_sequence A033870 A033871 A033872

KEYWORD

easy,nonn

AUTHOR

Naohiro Nomoto (6284968128(AT)geocities.co.jp)

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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