127744

Appears in sequences

• Numbers m not divisible by 6 such that sigma(m) == 12 (mod m).at n=2A084306
• Solutions to Mod[sigma(x),x]=12 of the form p*(p+13)/2 where p is a prime of form=2^j-13, of which j exponents are listed in A096818.at n=2A096821
• Sporadic solutions m to the congruence sigma(m) == 12 (mod m).at n=6A234238
• 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 57", based on the 5-celled von Neumann neighborhood.at n=16A278662
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 315", based on the 5-celled von Neumann neighborhood.at n=16A287625
• Practical numbers (A005153) that are abundant and have a record low value of abundancy index.at n=14A362052
• a(n) = (1/2) * Sum_{k=0..floor(n/3)} 2^(n-k) * binomial(2*n-4*k+2,2*k+1).at n=9A387603
• Primitive terms of A388271.at n=48A388272