44999

Appears in sequences

• Harmonic mean of digits is 6.at n=28A062184
• a(n) = smallest k such that 2k has digit sum = n.at n=42A077491
• Semiprimes with semiprime digits (digits 4, 6, 9 only).at n=38A107342
• Semiprimes (A001358) made of nontrivial runs of identical digits.at n=34A116063
• a(n) = 50*n^2 - 1.at n=29A157919
• a(n) = 72*n^2 - 1.at n=24A158738
• a(n) = 3*a(n-1) + 46*a(n-2) + a(n-3) with a(0)=2, a(1)=5, a(2)=106.at n=5A215572
• Numbers k such that 7*10^k - 23 is prime.at n=30A272271
• Numbers with digits 4 and 9 only.at n=37A284973
• Number of parts in all partitions of n with largest multiplicity nine.at n=34A320379
• Semiprimes that contain only digits 4 and 9.at n=10A368337
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} ( gcd(x_1, n)/gcd(x_1, x_2, x_3, n) )^2.at n=13A371492
• Sum of the legs of the unique primitive Pythagorean triple whose inradius is the n-th prime and whose short leg is an odd number.at n=34A382097
• a(n) = p(n)*p(n+1)*(p(n+1) - p(n)) + 1, where p(n) = prime(n).at n=34A383242