55230

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 94.at n=4A031772
• Numbers k having exactly 5 distinct prime factors, the largest of which is greater than or equal to sqrt(k) (i.e., sqrt(k)-rough numbers with exactly 5 distinct prime factors).at n=9A115959
• 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, 1), (-1, 0, 0), (0, 1, 0), (1, -1, -1), (1, 1, 0)}.at n=9A150063
• Number of Hamiltonian cycles in C_4 X C_n.at n=4A216588
• Array read by antidiagonals: T(n,m) = number of Hamiltonian cycles in C_n X C_m.at n=48A270273
• Array read by antidiagonals: T(n,m) = number of Hamiltonian cycles in C_n X C_m.at n=51A270273
• Triangle, read by rows, defined by recurrence: T(n,k) = T(n-1,k-1) + (-1)^k * (2 * k + 1) * T(n-1,k) for 0 < k < n with initial values T(n,0) = T(n,n) = 1 for n >= 0 and T(i,j) = 0 if j < 0 or j > i.at n=49A346083
• Expansion of 1/((1-x) * (1+3*x) * (1-5*x) * (1+7*x) * (1-9*x)).at n=5A383648