45525

Appears in sequences

• a(n) = 3*Catalan(n) - Catalan(n-1) - 1.at n=9A000781
• Fibonacci sequence beginning 1, 17.at n=18A022107
• 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, 0, 0), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.at n=10A148804
• G.f. A(x) satisfies A(x) = 1 + Sum_{n>=1} A(x)^n*x^n/(1 - x^n).at n=10A192207
• a(n) = 2*(-i)^n*(n*sin(c*(n+1)) - i*sin(-c*n))/sqrt(5) where c = arccos(i/2).at n=17A354044