45332

Appears in sequences

• a(n)/4^n is the expected number of tosses of a coin required to obtain n+1 heads or n+1 tails.at n=6A033504
• Maximum value of the n-th difference of a permutation of 0..n.at n=13A130783
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 0), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.at n=10A148454
• G.f.: exp( Sum_{n>=1} A322205(n)*x^n/n ), where A322205(n) is the coefficient of x^(2*n)*y^n/n in Sum_{n>=1} -log(1 - (x^n + y^n)).at n=8A322206