27618

Appears in sequences

• Numbers k such that 2^k - 5 is prime.at n=37A059608
• Barely abundant numbers: abundant n such that sigma(n)/n < sigma(m)/m for all abundant numbers m<n, sigma(n) being the sum of the divisors of n.at n=31A071927
• Number of partitions p of n such that the number of numbers having multiplicity 1 in p is a part of p.at n=41A241413
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 121", based on the 5-celled von Neumann neighborhood.at n=33A270208
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 318", based on the 5-celled von Neumann neighborhood.at n=40A271252
• Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes such that the maximum of the node outdegrees equals three.at n=10A292229
• Expansion of 1 / (1 + Sum_{k>=1} mu(k)^2 * x^k).at n=50A329099