27284

Appears in sequences

• Numbers k such that k + phi(k) + phi(phi(k)) is a repdigit.at n=23A116027
• Value of concatenation of all suffixes of binary representation of n.at n=26A241426
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 213", based on the 5-celled von Neumann neighborhood.at n=33A270903