32821

Appears in sequences

• Expansion of -arcsin(log(cos(x))) = (1/2!)*x^2 + (2/4!)*x^4 + (31/6!)*x^6 + (692/8!)*x^8 + ...at n=5A010789
• Number of collinear triples in a 3 X n rectangular grid.at n=41A057566
• Number of arrangements of n+3 numbers in 0..6 with each number being the sum mod 7 of three others.at n=2A183889
• T(n,k)=Number of arrangements of n+3 numbers in 0..k with each number being the sum mod (k+1) of three others.at n=30A183892
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 305", based on the 5-celled von Neumann neighborhood.at n=36A280975
• a(n) is the maximum value of the quartet index of a bifurcating rooted tree with n leaves.at n=37A300445
• Numbers k such that k![4] - 16 is prime, where k![4] = A007662(k) = quadruple factorial.at n=37A329166