22196

Appears in sequences

• T(2n-1,n-1), T given by A026692.at n=7A026696
• T(n,[ n/2 ]), T given by A026692.at n=15A026698
• Convolution of A000917 with A000984 (central binomial coefficients).at n=5A038697
• Number of real (0,1) n X n matrices such that some eigenvalues are strictly complex.at n=3A098148
• Structured heptagonal diamond numbers (vertex structure 5).at n=23A100179
• Number of edges in the n-th Mycielski graph.at n=10A122695
• Numbers k such that k and k^2 use only the digits 1, 2, 4, 6 and 9.at n=38A136995
• Floor of the expected value of number of trials until exactly three cells are empty in a random distribution of n balls in n cells.at n=22A210114
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >= 3n.at n=16A210368
• Sum of the denominators of the Farey series of order n (A006843).at n=47A240877
• Number of (n+2) X (2+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 or 00000011.at n=10A259717
• Integers k such that 3*k!!! + 1 is prime where k!!! is A007661(k).at n=48A271392
• 2..a(n) is the smallest range in which the most common value of omega(k) is n, where omega(k) is the number of prime divisors of k (A001221).at n=2A273380