28644

Appears in sequences

• a(n) = floor(n*phi^15), where phi is the golden ratio, A001622.at n=21A004930
• a(n) = round(n*phi^15), where phi is the golden ratio, A001622.at n=21A004950
• a(n) = Sum_{j=0..n} Sum_{k=0..j} A026615(j, k).at n=13A026624
• McKay-Thompson series of class 38a for Monster.at n=51A058658
• Numbers k such that sigma(sigma(sigma(k))) == 6*sigma(k).at n=28A067065
• Integers k such that omega(k) = omega(k-1) + omega(k-2) + omega(k-3), where omega(n) is the number of distinct prime factors of n.at n=20A076252
• a(n) = least k such that for any m>=0 k*sum(1<=u<=v<=w<=m,u^n*v/w) is an integer.at n=28A088944
• a(n) = least k such that for any m>=0 k*sum(1<=u<=v<=w<=m,u^n*v/w) is an integer.at n=29A088944
• Numbers n such that 4*10^n + 3*R_n - 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=27A102988
• The values of a in a^2 + b^2 = c^2 where b - a = 23 and gcd(a,b,c)=1.at n=8A117476
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x + 23)^2 = y^2.at n=13A118337
• A Jacobsthal-Pascal triangle.at n=48A124860
• A Jacobsthal-Pascal triangle.at n=51A124860
• a(n) = A051717(2n) + A051717(2n+1).at n=15A140812
• Numbers n such that n^6 + 545 is prime.at n=18A163592
• a(n) = Fibonacci(n+7) - Fibonacci(7).at n=16A180672
• s(k)-s(j), where the pairs (k,j) are given by A205857 and A205858, and s(k) denotes the (k+1)-st Fibonacci number.at n=34A205859
• s(k)-s(j), where the pairs (k,j) are given by A205862 and A205863, and s(k) denotes the (k+1)-st Fibonacci number.at n=29A205864
• Triangle T(n,k) read by rows, where T(n,k) is the number of k-dimensional faces of the polytope that is the convex hull of all permutations of the list (0,1,...,1,2), where there are n - 1 ones, for n > 0. T(0,0) is 1.at n=59A259569
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 622", based on the 5-celled von Neumann neighborhood.at n=43A269567