201326592

Appears in sequences

• a(n) = n*2^(n-1).at n=24A001787
• a(n) = 3*4^(n-1), n>0; a(0)=1.at n=14A002001
• Expansion of g.f. (1+x)/(1-2*x).at n=27A003945
• Length of longest trail (i.e., path with all distinct edges) on the edges of an n-cube.at n=24A005985
• a(n) = 3*2^n.at n=26A007283
• a(n) = n*4^n.at n=12A018215
• a(n) = Sum_{k=0..m} (k+1) * A026009(n, m-k) where m = floor(n/2)+1.at n=27A027292
• Denominator of Bernoulli(2n,1/2).at n=13A033469
• Coordination sequence for diamond structure D^+_24. (Edges defined by l_1 norm = 1.)at n=13A035888
• Row sums of the Lucas triangle A029635.at n=27A042950
• Smallest number x such that cototient(x) = 2^n.at n=27A058764
• For n >= 2, let N_n denote the set of all unipotent upper-triangular real n X n matrices A such that for every k=1,2,...,n-1 the minor of A with rows 1,2,...,k and columns n-k+1,...,n is nonzero. a(n) is the number of connected components of N_n.at n=25A060344
• Reciprocal of n terminates with an infinite repetition of digit 3. Multiples of 10 are omitted.at n=18A064562
• Arithmetic derivative of n^n.at n=8A068327
• Numbers m such that the largest prime power in the factorization of m equals phi(m).at n=24A081808
• a(n) = sum of (n-1)-th row terms of triangle A134059.at n=27A082505
• a(n+2) = 4*a(n), with a(0)=1, a(1)=3.at n=27A084221
• Determinant of the symmetric n X n matrix A defined by A[i,j] = |i-j| for 1 <= i,j <= n.at n=24A085750
• Least m such that omega(m) + Omega(m) = n, or 0 if no such m exists.at n=29A087009
• Product of digits associated with A091628(n). Essentially the same as A007283.at n=25A091629