18969

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 72 ones.at n=33A031840
• Number of 5 X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=7A224149
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 814", based on the 5-celled von Neumann neighborhood.at n=36A273644
• Odd numbers k such that phi(k) and cototient(k) have the same prime signature.at n=22A280927
• Sum of the largest parts in the partitions of n into 7 squarefree parts.at n=47A308960