28999

Appears in sequences

• Base-8 palindromes that start with 7.at n=23A043027
• Numerical distance between m-th and (n+m)-th circles in a loxodromic sequence of circles in which each 4 consecutive circles touch.at n=12A045821
• Numbers k such that k^14 == 1 (mod 15^3).at n=34A056087
• Antidiagonal sums of triangle A121775.at n=22A121776
• Palindromic numbers in bases 2 and 8 written in base 10.at n=59A259380
• Number of pairs of nested Dyck paths from (0,0) to (n,n) such that the upper path only touches the diagonal at its endpoints.at n=7A355281
• Number A(n,k) of k-tuples (p_1, p_2, ..., p_k) of Dyck paths of semilength n, such that each p_i is never below p_{i-1} and the upper path p_k only touches the x-axis at its endpoints; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=52A378112