69930

Appears in sequences

• Convolution of A000108 (Catalan numbers) with A038846.at n=5A042985
• Number of edges in all noncrossing connected graphs on n nodes on a circle.at n=5A045741
• A triangle related to A000108 (Catalan) and A000302 (powers of 4).at n=49A046527
• Even numbers k such that the central binomial coefficient A000984(k, k/2) is divisible by k^2.at n=34A080395
• a(n) = K_5(n) = Sum_{k>=0} A090285(5,k)*2^k*binomial(n,k). a(n) = 2*(2*n^5+45*n^4+360*n^3+1215*n^2+1528*n+315)/15.at n=8A090297
• A triangular sequence of coefficients of a PolyLog functional polynomials: p(x,n) = 16*x^(n + 1)*PolyLog(-n, (1 - x)/(1 + x))/((1 + x)*(1 - x)).at n=45A142154
• Numbers that are the sum of four third powers in exactly nine ways.at n=22A345154
• Members of A014574 with sum of prime factors (with multiplicity) also in A014574.at n=39A349455
• Numbers m such that the largest digit in the decimal expansion of 1/m is 4.at n=30A351470
• E.g.f. A(x) satisfies A(x) = 1/( 1 - 3*x*exp(x*A(x)) )^(2/3).at n=5A380040