111811

Appears in sequences

• Partial sums of hexagonal numbers with prime indices.at n=23A117962
• Numbers k such that k^p-p is prime, where p is product of the digits of k.at n=36A178328
• Number T(n,k) of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of k; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=59A262125
• Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of four.at n=6A320978
• Number of primary Carmichael numbers (A324316) less than 10^n.at n=19A324317