35415

Appears in sequences

• Numbers k such that k and k^2 use only the digits 1, 2, 3, 4 and 5.at n=31A136968
• Numbers k such that the decimal expansions of both k and k^2 have 1 as smallest digit and 5 as largest digit.at n=8A256889
• a(n) is the number of permutations of length n that avoid the pattern 321 and the mesh pattern (12, 170).at n=14A289452
• The Riordan square of the double factorial of odd numbers. Triangle T(n, k), 0 <= k <= n, read by rows.at n=30A321627