131384

Appears in sequences

• a(n) = (A102877(n+1) - A102877(n))/2.at n=12A111017
• Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at least 4.at n=12A242524
• Number of series-reduced planted achiral trees with n leaves spanning an initial interval of positive integers.at n=17A317100