42392

Appears in sequences

• a(n) = (1/C(n,0) - 1/C(n,1) + ... + d/C(n,k))*L, where d = (-1)^k,k = [ n/2 ], L = LCM{C(n,0), C(n,1),..., C(n,n)}.at n=15A025536
• Triangular array T(n,k) giving number of 3-connected graphs with n labeled nodes and k edges (n >= 4, ceiling(3*n/2) <= k <= n(n-1)/2).at n=15A123542
• Sizes of successive increasing gaps between 2-pseudoprimes.at n=20A175738
• Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+4x+4y>0.at n=22A211626
• Expansion of f(x^2)^2 / f(-x) in powers of x where f() is a Ramanujan theta function.at n=41A260163
• G.f. A(x) satisfies: A(x) = Sum_{n>=0} (n+1) * x^n / (1 - x^(n+1)*A(x)^n).at n=13A340359