168300

Appears in sequences

• a(n) = n*(n+1)*(2*n+1)*(3*n+1)*(4*n+1)/6.at n=8A011197
• Expansion of 1/(1-x^3-x^4-x^5-x^6-x^7-x^8-x^9).at n=37A017822
• Coefficient triangle for certain polynomials N(2; n,x) (rising powers of x).at n=40A062991
• 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=50A094385
• Numbers with prime factorization pqr^2s^2t^2.at n=12A190379
• Borel's triangle read by rows: T(n,k) = Sum_{s=k..n} binomial(s,k)*C(n,s), where C(n,s) is an entry in Catalan's triangle A009766.at n=40A234950
• Least k whose set of divisors contains exactly n quadruples (x, y, z, w) such that x^3 + y^3 + z^3 = w^3, or 0 if no such k exists.at n=18A337098
• a(n) = Sum_{k=0..n} binomial(2*k, k)*binomial(2*n, n)/(n + 1). Row sums of A379100.at n=6A379099
• Irregular triangle read by rows: T(n,k) is the number of n X n binary matrices containing k South-East paths of 1's connecting the top left and bottom right corners.at n=37A380392