955206domain: NAppears in sequencesSums of adjacent amicable numbers, a(n) = A063990(2n-1) + A063990(2n).at n=27A161005The sum of the two numbers in an amicable pair, A002025(n) + A002046(n).at n=27A180164The sum (in nondecreasing order) of the two numbers in an amicable pair.at n=27A259953