-9694845

Appears in sequences

• Numerators in expansion of sqrt(1+x). Absolute values give numerators in expansion of sqrt(1-x).at n=16A002596
• Carlitz-Riordan q-Catalan numbers (recurrence version) for q = -1.at n=31A090192
• An inverse Chebyshev transform of 1-x.at n=29A099363
• Expansion of c(-x^2)(1+2x-sqrt(1+4x^2))/2, c(x) the g.f. of A000108.at n=30A106181
• Expansion of c(-x^2)(1+2x-sqrt(1+4x^2))/2, c(x) the g.f. of A000108.at n=31A106181
• O.g.f. inverse of Catalan A000108 o.g.f.at n=16A115140
• Convolution of A115140 with itself.at n=16A115141
• a(n) = (-1)^[(n+1)/2] A000108([n/2]+1).at n=29A129996
• a(n) = (-1)^n*Catalan(n).at n=15A168491
• Expansion of 1 - x - (1 - sqrt(1 + 4*x^4)) / (2*x) in powers of x.at n=63A182492
• Expansion of (-1 + 2*x + sqrt( 1 - 4*x^2)) / (2*x) in powers of x.at n=31A210628
• Convolution inverse of A001700.at n=16A246432