24154

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 81.at n=24A020420
• Fibonacci sequence beginning 4, 22.at n=16A022385
• Number of binary rooted trees with n nodes and height exactly 8.at n=18A036597
• Arithmetic mean of primes on square intervals such that the mean is an integer.at n=22A161348
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 1006", based on the 5-celled von Neumann neighborhood.at n=37A273861
• a(n) = T(n, 4) with T(n, k) = Sum_{d|k} phi(d)*binomial(n - 1 + k/d, k/d).at n=26A327032
• a(n) = sum of the first n primes whose distance to next prime is 4.at n=45A360226