32835

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/5 of the elements are <= n/2.at n=22A047165
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/5 of the elements are <= (n-1)/2.at n=22A047176
• Numbers n such that 4*10^n + 1 is prime.at n=16A056806
• Odd numbers k such that the number of 1's in binary representation of k equals omega(k), the number of distinct primes in the factorization of k.at n=30A071595
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (1, 0, -1), (1, 0, 1), (1, 1, -1)}.at n=9A149344
• Number of 0..n arrays x(0..5) of 6 elements with nondecreasing average value and 0..n occur with instance counts within one of each other.at n=11A200945
• Numbers n such that 7^n + 6 is prime.at n=12A217130
• Number T(n,k) of collections of nonempty multisets with a total of n objects of exactly k colors; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=42A255903
• Number of collections of nonempty multisets with a total of n objects of exactly six colors.at n=2A255946
• Number of collections of nonempty multisets with a total of n+2 objects of exactly n colors.at n=6A255952
• Number of vertices of type B at level n of the hyperbolic Pascal pyramid.at n=12A292291
• Odd numbers m such that at least one of the factors of Stern polynomial B(m,x) has at least one negative coefficient.at n=22A389915