%I #24 Dec 13 2020 05:08:32

%S 0,0,0,0,0,0,1,0,0,0,1,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,

%T 0,0,0,1,0,0,1,0,0,0,0,1,0,1,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,

%U 0,0,0,1,0,0,0,0,0,1,0,0,0,1

%N Relative parity of A002025(n) and A002046(n), the two members of the n-th amicable pair: 0 if both members are even, 1 if both members are odd or -1 if they have opposite parity.

%C No value of n is known such that a(n) = -1.

%H Amiram Eldar, <a href="/A265757/b265757.txt">Table of n, a(n) for n = 1..10000</a>

%H J. Alanen, O. Ore and J. Stemple, <a href="http://dx.doi.org/10.1090/S0025-5718-1967-0222006-7">Systematic computations on amicable numbers</a>, Math. Comp., Vol. 21, No. 98 (1967), pp. 242-245.

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Amicable_numbers">Amicable numbers</a>.

%Y Cf. A002025, A002046, A259180.

%K nonn

%O 1

%A _Felix Fröhlich_, Dec 15 2015