302702400

Appears in sequences

• a(1) = 1, a(n) = a(n-1) times smallest divisor of n >= n^(1/2).at n=13A072489
• Number of labeled rooted trees where each node at height h has 0 or h+1 children.at n=13A075533
• Denominators of partial sums for a series for 2*Zeta(2)/3 = (Pi^2)/9.at n=7A130550
• Denominators of partial sums of a certain alternating series of inverse central binomial coefficients.at n=7A145560
• Denominators of partial sums of a certain series of inverse central binomial coefficients.at n=7A145565
• a(n) = Bernoulli(2n)*(2n+1)!/n!.at n=7A168136
• The number of permutations of the first n elements of the Hofstaedter Q-sequence (A005185), augmented by Q(0)=1.at n=13A169637
• Number of permutations of 1..n with no element e[i>=2]<e[1+floor((i-2)/3)] (3-way heap).at n=15A178008
• Triangle read by rows. A generalization of unsigned Lah numbers, called L[4,3].at n=29A292219
• Triangle of derivatives of the Niven polynomials evaluated at 0.at n=51A303986
• Zeckendorf-infinitary perfect numbers: numbers k such that A331107(k) = 2*k.at n=8A331108
• Table read by rows: T(n, k) = A124320(n + 1, k) * A132393(n, k).at n=41A368583
• Positive integers k such that the set {d+k/d : d|k} contains four consecutive integers.at n=8A386303