673596

Appears in sequences

• Expansion of 1/(1-3*x)^7; 7-fold convolution of A000244 (powers of 3).at n=6A036220
• a(n) = 3^n*(2*n)!/(n!)^2.at n=6A098658
• Expansion of e.g.f. BesselI(0,2*sqrt(3)*x) + BesselI(1,2*sqrt(3)*x)/sqrt(3).at n=12A098662
• Expansion of (sqrt(1-12*x^2)+12*x^2+2*x-1)/(2*x*sqrt(1-12*x^2)).at n=12A103978
• Expansion of (1-12*x)^(-3/2).at n=5A115903
• Triangle of z Transform coefficients from General Pascal [1,10,1} A142459 polynomials multiplied by factor 3^Floor[(2*k - 1)/3].at n=27A167787
• Triangle read by rows: T(n,k) = 3^(n-k)*C(2*n,n-k).at n=21A386825