32623

Appears in sequences

• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFS = MAPSO-46 starting with a T1 atom.at n=6A018965
• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite BPH = Beryllophosphate-H Na7K7[Be14P14O56].20H2O starting with a T1 atom.at n=6A018995
• a(n) = Sum_{k=1..n} k^(n-k)*binomial(n,k-1).at n=7A074728
• Palindromes for which the multiplicative digital root is a prime.at n=33A117059
• Triangle read by rows: T(n,k) is the number of weighted lattice paths in L_n having k (1,0)-steps of weight 2. These are paths that start at (0,0) , end on the horizontal axis and whose steps are of the following four kinds: an (1,0)-step with weight 1; an (1,0)-step with weight 2; a (1,1)-step with weight 2; a (1,-1)-step with weight 1. The weight of a path is the sum of the weights of its steps.at n=57A182885
• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,4,2,0,1,0,0 for x=0,1,2,3,4,5,6.at n=5A197718
• Palindromic composite numbers starting with a digit 3.at n=34A222726
• Composite numbers k such that sigma(k + sigma(k)) = 2*sigma(k).at n=31A246858
• Numbers k such that (19*10^k - 37)/9 is prime.at n=22A283496
• Expansion of e.g.f. Sum_{k>=1} prime(k)*(exp(x) - 1)^k/k!.at n=7A307771
• Numbers of the form prime(w)*prime(x)*prime(y) with w >= x >= y such that 2w = 3x + 4y.at n=39A358102