102249

Appears in sequences

• Number of nonequivalent dissections of an (n+2)-gon by nonintersecting diagonals up to rotation and reflection.at n=11A001004
• Expansion of e.g.f. theta_3^(21/2).at n=4A015677
• Numbers k such that k and 9*k are anagrams.at n=12A023093
• To compute a(n) we first write down 7^n 1's in a row. Each row takes the rightmost 7th part of the previous row and each element in it equals sum of the elements of the previous row starting with the first of the rightmost 7th part. The single element in the last row is a(n).at n=4A109059
• Number of quadruples (p_1, ..., p_4) of positive integers such that p_{i-1} <= p_i <= n^(i-1).at n=7A354608