18067

Appears in sequences

• Fibonacci sequence beginning 1, 29.at n=15A022399
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 21 ones.at n=9A031789
• Numbers n such that sigma(n)=phi(n*bigomega(n)-1).at n=33A067877
• Let M be the matrix defined in A111490. Sequence gives the sum of the elements of the submatrices (from the upper left element): M(1,1); M(1,1)+M(1,2)+M(1,2)+M(2,2); M(1,1)+M(1,2)+M(1,3)+M(2,1)+M(2,2)+M(2,3)+M(3,1)+M(3,2)+M(3,3), etc.at n=41A123326
• Number of n X 3 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=28A224141
• Sequence of distinct least positive numbers such that the average of the first n terms is a Fibonacci number.at n=27A248982
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 249", based on the 5-celled von Neumann neighborhood.at n=28A271014
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 497", based on the 5-celled von Neumann neighborhood.at n=28A272558
• Expansion of Product_{k>=0} (1-x^(5*k+1))^(5*k+1).at n=44A285071
• Expansion of Product_{k>=1} (1 + x^(5*k-4))^(5*k-4).at n=44A285338
• Number of parts in all partitions of n in which no part occurs more than five times.at n=27A320608