27675

Appears in sequences

• Number of partitions of n into aliquant parts (i.e., parts that do not divide n).at n=55A098743
• (1/4)*number of nonsquare rectangles with corners on an n X n grid of points.at n=20A122225
• The Wiener index of the Dutch windmill graph D(6,n) (n>=1).at n=24A180578
• Numbers n such that n!10 + 2 is prime.at n=53A204657
• Exponential generating function A(x) is the unique solution of the Cauchy problem: A'(x) = exp(x+A(x)^2-1), A(0) = 1.at n=6A209305
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 417", based on the 5-celled von Neumann neighborhood.at n=36A272018
• Numbers n such that n and n+1 both have 24 divisors.at n=6A274362
• Least numbers k that can be expressed as k = a' + b', with k = a + b, in exactly n ways, where a' and b' are the arithmetic derivatives of a and b.at n=6A292362
• Numbers k such that A384247(k) = A384247(k+1).at n=38A385743
• G.f. satisfies A(x) = Sum_{n>=0} x^n * Product_{k=0..n} (1 + a(1)*x + a(2)*x^2 + a(3)*x^3 + ... + a(k)*x^k).at n=14A385906