201727

Appears in sequences

• Numbers to which Mersenne primes 2^p-1 can be congruent mod k! (for k > 1).at n=24A145038
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 149", based on the 5-celled von Neumann neighborhood.at n=19A279180