109214

Appears in sequences

• Numbers k such that k and k+1 have same sum of divisors.at n=24A002961
• Numbers k such that k and k+1 have the same number and sum of divisors.at n=8A054004
• Numbers k such that A065608(k) = A065608(k+1).at n=11A065062
• Numbers n such that sigma(n+1) - sigma(n) = k*n for some integer k, where sigma(n) = A000203 (sum of divisors of n).at n=33A223136
• Runs of consecutive numbers with the same number and sum of divisors.at n=16A225758
• Numbers k such that the average of the divisors of k and k+1 is the same.at n=21A238380
• Number of permutations of [n] avoiding {4231, 3142, 1234}.at n=14A294726
• Numbers k such that t(k) = t(k+1) where t(k) = tau(k) + sigma(k) = A007503(k) is the number of subgroups of the dihedral group of order 2k.at n=8A322256
• Numbers m such that the delta(m) = abs(sigma(m+1)/(m+1) - sigma(m)/(m)) is smaller than delta(k) for all k < m.at n=29A335071
• Numbers k such that k and k+1 have the same number and sum of divisors but a different number of distinct prime factors.at n=1A350800