28500

Appears in sequences

• a(n) = floor(n*(n+2)*(2*n-1)/8).at n=47A007518
• Schoenheim bound L_1(n,n-5,n-6).at n=23A036837
• Integers that can be expressed as the sum of consecutive primes in exactly 5 ways.at n=9A055000
• Integers expressible as the sum of (at least two) consecutive primes in at least 5 ways.at n=3A067375
• Numbers n such that sopf(sigma(n)) = sigma(sopf(n)), where sopf(x) = sum of the distinct prime factors of x.at n=37A076532
• Number of digits of the (10^n)-th tetranacci number (A000078(10^n)).at n=5A097353
• Number of circular compositions of n such that no two adjacent parts are equal.at n=23A106369
• E.g.f. satisfies: A(x) = Sum_{n>=0} log(1 + x*A(x)^n)^n/n!.at n=6A189981
• Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of length 3.at n=24A202843
• Number of secondary structures of size n having no stacks of length 3.at n=15A202844
• Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|=n-w+|y-z|.at n=38A212684
• a(n) = (binomial(n,5) - floor(n/5)) / 5.at n=24A215052
• a(n) = (n+1)! * int(Gamma(n+x)/Gamma(x), x = 0..1).at n=5A245765
• Number of length n+5 0..2 arrays with no six consecutive terms having five times any element equal to the sum of the remaining five.at n=4A249524
• T(n,k)=Number of length n+5 0..k arrays with no six consecutive terms having five times any element equal to the sum of the remaining five.at n=19A249530
• Number of length 5+5 0..n arrays with no six consecutive terms having five times any element equal to the sum of the remaining five.at n=1A249535
• Number of terms in the cycle index Z(S_n X S_n) of the Cartesian product of the symmetric group S_n with itself that contain q cycles, where 1 <= q <= n*n. (Triangular array.)at n=68A279514
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 318", based on the 5-celled von Neumann neighborhood.at n=14A281100
• Number of irredundant sets in the path graph P_n.at n=18A286887
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^3).at n=19A343283