-4862

Appears in sequences

• Carlitz-Riordan q-Catalan numbers (recurrence version) for q = -1.at n=19A090192
• Riordan array (1,c(-x)), where c(x) = g.f. of Catalan numbers.at n=56A099039
• An inverse Chebyshev transform of 1-x.at n=17A099363
• Expansion of c(-x^2)(1+2x-sqrt(1+4x^2))/2, c(x) the g.f. of A000108.at n=18A106181
• Expansion of c(-x^2)(1+2x-sqrt(1+4x^2))/2, c(x) the g.f. of A000108.at n=19A106181
• Inverse of number triangle A106268; triangle T(n,k), 0 <= k <= n.at n=45A106270
• Inverse of number triangle A106268; triangle T(n,k), 0 <= k <= n.at n=56A106270
• O.g.f. inverse of Catalan A000108 o.g.f.at n=10A115140
• Convolution of A115140 with itself.at n=10A115141
• Inverse of number triangle A(n,k) = 1/C(n) if k <= n <= 2k, 0 otherwise, where C(n) = A000108(n).at n=64A127767
• a(n) = (-1)^[(n+1)/2] A000108([n/2]+1).at n=17A129996
• Table, read by rows, of coefficients of characteristic polynomials of almost prime matrices.at n=24A131175
• a(n) = -(n - 4)*(n - 5)*(n - 12)/6.at n=32A167541
• a(n) = (-1)^n*Catalan(n).at n=9A168491
• Riordan array (f(x), x*f(x)) where f(x) is the g.f. of A168491.at n=45A171567
• Triangle Id-(xc(x),xc(x)), c(x) the g.f. of the Catalan numbers A000108.at n=55A181645
• Triangle Id-(xc(x),xc(x)), c(x) the g.f. of the Catalan numbers A000108.at n=56A181645
• Expansion of 1 - x - (1 - sqrt(1 + 4*x^4)) / (2*x) in powers of x.at n=39A182492
• Composition of Catalan and Fibonacci numbers.at n=45A189675
• Expansion of (-1 + 2*x + sqrt( 1 - 4*x^2)) / (2*x) in powers of x.at n=19A210628