2497294800domain: NAppears in sequencesa(n) is the A106490 index where n first occurs.at n=13A276230Noninfinitary superabundant numbers: numbers m such that nisigma(m)/m > nisigma(k)/k for all k < m, where nisigma(m) is the sum of noninfinitary divisors of m (A348271).at n=19A348273