20409
domain: N
Appears in sequences
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 100 ones.at n=8A031868
- Number of n-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and three times sum of squares <= n^2*(n+1).at n=5A208806
- Number of n-bead necklaces labeled with numbers -6..6 not allowing reversal, with sum zero and three times sum of squares <= n*(6)*(6+1).at n=5A208812
- T(n,k)=Number of n-bead necklaces labeled with numbers -k..k not allowing reversal, with sum zero and three times sum of squares <= n*k*(k+1).at n=60A208814
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 590", based on the 5-celled von Neumann neighborhood.at n=40A273117
- Number of dominating sets in the n-triangular grid graph.at n=4A287064
- Number of nX3 0..1 arrays with every element equal to 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=11A300345
- Expansion of Product_{k>=1} 1/(1 - x^k)^(mod(k,3)).at n=34A301589