-4446

Appears in sequences

• Riordan array (1/(1+x), x(1-x)/(1+x)^2).at n=49A110511
• McKay-Thompson series of class 18i for the Monster group.at n=52A112157
• a(n) = 13*a(n-1) - 65*a(n-2) + 156*a(n-3) - 182*a(n-4) + 91*a(n-5) - 13*a(n-6), with initial terms 0, -2, -9, -44, -215, -1001.at n=6A216861
• G.f. A(x) satisfies [x^(2*n)] A(x)^(3*n) = 3 and [x^(2*n+1)] A(x)^(3*n+1) = [x^(2*n+1)] A(x)^(3*n+2) for n >= 1.at n=9A377095