A051594 Maximal elements of pairs of "(-1)sigma amicable numbers", sorted by their minimal elements.

466200, 604656, 1103760, 2580048, 3652560, 5823216, 5255856, 5733288, 6941160, 7780968, 7738128, 11063448, 16588192, 14914224, 19592496, 17928144, 21614544, 20934576, 23009200, 22829040, 28157688, 29892800, 25180848, 28536300

Offset

0,1

Links

Table of n, a(n) for n=0..23.

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 b; A051595 gives the values of a.

Crossrefs

Cf. A051595, A049060.

Sequence in context: A206759 A257951 A213461 * A238045 A341152 A096889

Adjacent sequences: A051591 A051592 A051593 * A051595 A051596 A051597

Keyword

nonn

Author

Yasutoshi Kohmoto

Extensions

Edited by Dean Hickerson, Nov 06 2006

More terms from Max Alekseyev, Jan 31 2010

Status

approved