28779

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 31 ones.at n=7A031799
• Numbers k whose decimal representation, read as a base-18 value and divided by k, yields an integer.at n=30A032567
• Partial sums of A045618.at n=9A045889
• Triangle read by rows: T(n,k) is the number of nondecreasing Dyck paths of semilength n, having k distinct valley levels (n>=1, k>=0).at n=50A121463
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 33", based on the 5-celled von Neumann neighborhood.at n=36A269812
• Irregular triangular array read by rows: T(n,k) = number of non-isomorphic unlabeled connected graphs with loops on n nodes and with k edges.at n=75A283755
• L.g.f.: -log(Product_{k>=1} (1 - k*x^k)^k) = Sum_{n>=1} a(n)*x^n/n.at n=17A296601
• Number of connected components of n faces of the truncated icosahedron up to the 120 rotations and reflections of the truncated icosahedron.at n=25A384109