18883

Appears in sequences

• Number of asymmetric permutation rooted trees with n nodes.at n=12A005355
• Number of distinct quadratic residues mod 6^n.at n=7A039303
• Numbers whose natural logarithm, in base 10, starts with 10 distinct digits.at n=7A113509
• Expansion of 1/(1 - x - x^3 + x^5).at n=47A123552
• Numbers n such that there are a, b with abs(sigma(a) - sigma(b)) = sigma(n) - n and a U b = n, where U is decimal concatenation.at n=20A239563
• Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and the average of every three consecutive elements is never greater than the median of the previous three elements.at n=19A263733
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 149", based on the 5-celled von Neumann neighborhood.at n=29A270319