92820

Appears in sequences

• a(n) = 5*binomial(n, 6).at n=18A000910
• a(n) = n*(n+1)*(2*n+1)*(3*n+1)/6.at n=17A011195
• Partial sums of A051877.at n=12A050403
• Saint-Exupéry numbers: ordered products of the three sides of Pythagorean triangles.at n=26A057096
• Number of orbits of length n in map whose periodic points come from A006954.at n=47A060479
• Coefficient triangle for certain polynomials N(2; n,x) (rising powers of x).at n=38A062991
• Ordered products of the sides of primitive Pythagorean triangles.at n=10A063011
• Numbers k such that phi(k) < k/5.at n=10A066765
• Numbers k such that phi(k) = 2*tau(k)^2.at n=35A068564
• a(n) = n*(n - 1)*(n^2 + 1)/2.at n=21A071252
• Numbers with six distinct prime divisors.at n=21A074969
• Triangle of coefficients, read by rows, where T(n,k) is the coefficient of x^n*y^k in f(x,y) that satisfies f(x,y) = (1+x) - x^2*(1+x)^3 + xy*f(x,y)^3.at n=42A086634
• Triangle read by rows: T(n, k) = binomial(2*n, k-1)*binomial(2*n-k-1, n-k)/n for n, k >= 1, and T(n, 0) = 0^n.at n=52A094385
• a(n) = Max { k>0 : denominator(S(k,2n+1)) } where S(k,s)=sum(i=1,k,i^s*H(i,2)) - H(k,2)*H(k,-s) and H(k,r)=sum(i=1,k,1/i^r) are the generalized harmonic numbers.at n=47A096442
• Molien series for complete weight enumerators of Euclidean self-dual codes over the Galois ring GR(4,2).at n=17A099720
• Triangle read by rows, where the g.f. satisfies A(x, y) = 1 + x*A(x, y)^2 + x*y*A(x, y)^3.at n=32A104978
• Triangle read by rows: T(n,k) is number of paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1),U=(1,2), or d=(1,-1) and have k peaks of the form Ud.at n=31A108426
• Triangle read by rows: T(n,k) is number of paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1), U=(1,2), or d=(1,-1) and have k down steps (d).at n=60A108429
• Icosagonal numbers divisible by 20.at n=21A117798
• G.f. satisfies: 30*A(x) = 29 + 125*x + A(x)^5, starting with [1,5,10].at n=6A120598