27802

Appears in sequences

• Erroneous version of A309982.at n=17A006775
• Numbers k such that the continued fraction for sqrt(k) has period 81.at n=32A020420
• Number of noncrossing rooted trees with n nodes on a circle that do not have leaves at level 1.at n=8A023053
• Position of first repeat of the opening sequence of length n occurring after the first repeat of the opening sequence of length n-1 in the Kolakoski sequence (A000002).at n=40A074300
• Triangle read by rows: T(n,k) is the number of noncrossing trees with n edges and k leaves at level 1.at n=36A101371
• Number of partitions of n having depth 1; see Comments.at n=40A237685
• Integers which can be written in exactly three ways as sum of two distinct nonzero pentagonal numbers.at n=36A333013