19022

Appears in sequences

• Triangle of increasing mobiles (circular rooted trees) with n nodes and k leaves.at n=47A055356
• Number of increasing mobiles (circular rooted trees) with n nodes and 3 leaves.at n=6A055357
• a(0)=3; a(n) = n^2 + a(n-1) for n>0.at n=38A153057
• a(n) = Floor(Fibonacci(n)^(1/Pi)).at n=66A171962
• Sum of the denominators of the Farey series of order n (A006843).at n=45A240877
• Number of n-node rooted identity trees with thinning limbs and root outdegree (branching factor) 2.at n=18A245121
• a(n) = floor(1/(zeta(4) - Sum_{h=1..n} 1/h^4)).at n=17A248230
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 187", based on the 5-celled von Neumann neighborhood.at n=29A270675
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 205", based on the 5-celled von Neumann neighborhood.at n=30A270731