37067

Appears in sequences

• Number of ordered quadruples of integers from [ 1..n ] with no global factor.at n=29A015634
• Numbers k such that the product of the first k composite numbers minus 1 is a prime.at n=29A057017
• a(n) = k such that the k-th triangular number is A068808(n).at n=27A067991
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 521", based on the 5-celled von Neumann neighborhood.at n=34A272736
• Number of nX4 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=8A300635