123109

Appears in sequences

• a(n) = 2*a(n-1) + (n-1)*a(n-2).at n=10A005425
• Number of independent subsets of nodes in graph formed from n-fold subdivision of 9-dimensional simplex.at n=3A027736
• Numbers n such that 7*3^n - 2 is prime.at n=38A058605
• Triangle read by rows: S_B(n,k) = "Type B" Stirling numbers of the second kind.at n=54A085483
• Values of Laguerre polynomials: a(n) = 2^n*n!*LaguerreL(n,-1/2,-2).at n=5A093620