330101

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 45.at n=23A031633
• Integers k such that in the list of divisors of k (in base 5), each digit 0-4 appears equally often.at n=18A045869
• G.f. A(x) satisfies (6*A(x^9)/A(x) - 1)^3 = 126*A(x^3)^4/A(x)^4 - 1 + 54*x.at n=7A376525