-12155

Appears in sequences

• Expansion of 1/(1-x*(1-6*x)).at n=11A145934
• Array of coefficients a(k,n) of the formal power series A(k,x) read by upwards antidiagonals, where A(k,x) = ((2*k+1)*x+sqrt(1+4*k*(k+1)*x^2))/(1-x^2), k>=0.at n=63A277930
• Array read by ascending antidiagonals: A(n,k) = numerator(binomial(n-1/2,k)) with k >=0.at n=54A381059