115995
domain: N
Appears in sequences
- a(n) = n*(n+1)*(2*n+1)*(3*n+1)/6.at n=18A011195
- Number of nonempty subsets of {1,2,...,n} in which exactly 2/5 of the elements are <= n/2.at n=20A047166
- Number of nonempty subsets of {1,2,...,n} in which exactly 2/5 of the elements are <= (n-1)/2.at n=20A047177
- (1/168)*(sigma_7(2n-1)-sigma_1(2n-1)).at n=5A081862
- Fifth column of (1,5)-Pascal triangle A096940.at n=35A096942
- The number of P-positions in the game of Nim with up to 5 piles, allowing for piles of zero, such that the number of objects in the largest pile is n.at n=37A241731
- G.f. satisfies: A(x)^2 = x + A(x*A(x)^6).at n=5A241998