34359672832domain: NAppears in sequencesa(n) = 2*4^n + (-1)^n*2^(n-1).at n=16A120470a(n) = 6*a(n-1) - 8*a(n-2) for n > 1; a(0) = 7, a(1) = 30.at n=16A171472Greater member of Carmichael's variant of amicable pair: numbers k < m such that s(k) = m and s(m) = k, where s(k) = A371418(k).at n=24A371420