10661420domain: NAppears in sequencesRamanujan's tau function (or Ramanujan numbers, or tau numbers).at n=18A000594Ramanujan function tau(p) as p runs through the primes.at n=7A076847The odd bisection of A000594.at n=9A099059Ramanujan function tau(p) as p runs through the prime powers: a(n) = A000594(A000961(n)).at n=12A278577