21429

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 78 ones.at n=29A031846
• Trajectory of 3 under map n->7n+1 if n odd, n->n/2 if n even.at n=33A037101
• a(n) = A048141(3*n).at n=53A051061
• a(n) = (1/3!)*(n^3 + 24*n^2 + 107*n + 90), compare A059604.at n=43A059605
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 358", based on the 5-celled von Neumann neighborhood.at n=44A271412
• a(0)=7; a(n) = 7*a(n-1) + 1 if a(n-1) is odd, a(n) = a(n-1)/2 otherwise.at n=38A271623
• The cell number where a knight is trapped when moving on a spirally numbered hexagonal board to the lowest available unvisited cell and starting at cell n.at n=16A333684