1047122

Appears in sequences

• Least k such that (k*M(n))^2+k*M(n)-1 is the first of a pair of twin primes, where M(n) = Mersenne primes.at n=15A109342
• Least number k such that (k*M(n))^2 + k*M(n) - 1 and (k*M(n))^2 + k*M(n) + 1 are twin primes where M(n) is the n-th Mersenne prime.at n=15A121371
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 283", based on the 5-celled von Neumann neighborhood.at n=19A280529