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A051595
Minimal elements of pairs of "(-1)sigma amicable numbers", sorted by their minimal elements.
1
429552, 497808, 800496, 2472912, 3329712, 4925808, 5033808, 5470632, 5756616, 7584408, 7696368, 8498952, 13172000, 14484816, 16112304, 17901936, 18349776, 20867184, 21395600, 21895920, 22581000, 24395200, 24805872, 27369900
OFFSET
0,1
FORMULA
(-1)sigma(a) = (-1)sigma(b) = a+b where a<b. Here (-1)sigma(n) = A049060(n): If n = Product p(i)^r(i) then (-1)sigma(n) = Product(-1+Sum p(i)^s, s=1 to r(i)). This sequence gives the values of a; A051594 gives the values of b.
CROSSREFS
Sequence in context: A234448 A269798 A251639 * A234857 A186593 A328197
KEYWORD
nonn
EXTENSIONS
Edited by Dean Hickerson, Nov 06 2006
More terms from Max Alekseyev, Jan 31 2010
STATUS
approved