6241280

Appears in sequences

• arcsin(tanh(x)+tan(x))=2*x+8/3!*x^3+320/5!*x^5+31488/7!*x^7...at n=4A013135
• Number of permutations of length 2*n-1 with no local maxima in even positions.at n=5A113583
• Number of permutations of [1..n] which achieve the worse case bound for a graph domination problem.at n=11A272640
• Number of 2-color vertex orderings of the labeled path graph on n vertices in which the number 1 is assigned to a vertex in an odd position.at n=10A360514
• Expansion of e.g.f. exp(2*x/3) / (1-3*x)^(1/9).at n=8A381505