50522

Appears in sequences

• Expansion of e.g.f. tan(x)*sin(x) (even powers only).at n=5A009744
• Expansion of e.g.f. tanh(x)*exp(x).at n=10A009832
• Number of fixed points in all reverse alternating (i.e., up-down) permutations of {1,2,...,n}.at n=9A162977
• a(n) is equal to a(n-1) plus (a(n-1) written in base n but interpreted in base n+1), with a(1)=1.at n=14A330489
• Number of reversed integer partitions y of n with exactly one fixed point y(i) = i.at n=44A352832
• a(n) is the number of distinct values of the determinant of an n X n Hankel matrix using the integers 1 to 2*n - 1.at n=5A369942