29309

Appears in sequences

• Number of distinct sums of subsets of the first n squares {1,4,9,...,n^2}.at n=43A208531
• Numbers that are equal to the sum of the number of divisors of their first k arithmetic derivatives, for some k.at n=35A269459
• Odd squarefree numbers n > 1 such that lambda(n)^2 = phi(n), where lambda is the Carmichael lambda function and phi is Euler's totient function.at n=24A276980
• Least integer k such that k/2^n > sqrt(1/5).at n=16A293335
• The integer k that minimizes |k/2^n - sqrt(1/5)|.at n=16A293336
• Replacing each digit d in decimal expansion of n with d^2 yields a prime at each step when done recursively three times.at n=27A316604
• Numbers whose square and cube taken together contain each decimal digit at least twice.at n=12A363909