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Search: id:A062731
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A062731 Sum of divisors of 2n. +0
2
0, 3, 7, 12, 15, 18, 28, 24, 31, 39, 42, 36, 60, 42, 56, 72, 63, 54, 91, 60, 90, 96, 84, 72, 124, 93, 98, 120, 120, 90, 168, 96, 127, 144, 126, 144, 195, 114, 140, 168, 186, 126, 224, 132, 180, 234, 168, 144, 252, 171, 217, 216, 210, 162, 280, 216, 248, 240, 210 (list; graph; listen)
OFFSET

0,2

PROGRAM

(PARI) je=[]; forstep(n=0, 450, 2, je=concat(je, sumdiv(n, d, d))); je

(MuPad) numlib::sigma(2*n)$ n=0..81 - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 13 2008

CROSSREFS

Cf. A008438.

Sequence in context: A024614 A045134 A081695 this_sequence A083031 A022805 A107790

Adjacent sequences: A062728 A062729 A062730 this_sequence A062732 A062733 A062734

KEYWORD

easy,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Jul 11 2001

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.


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