211876

Appears in sequences

• Binomial coefficient C(7n,n-3).at n=4A004371
• a(n) = binomial coefficient C(n,45).at n=4A010998
• Binomial coefficients C(49,n).at n=4A017765
• Numbers n such that 185*2^n-1 is prime.at n=26A050844
• Binomial coefficients binomial(2*n-3,4).at n=22A053126
• Triangle read by rows: T(n,k) = binomial(n^2, k), 0 <= k <= n.at n=32A090642
• Triangle read by rows: T(n,k) = binomial(t(n) - t(k-1),k), where t(j) = j*(j+1)/2; 1<=k<=n.at n=48A110770
• Triangle T(n, k) = binomial((n-k)^2, k^2) read by rows.at n=47A123163
• G.f. A(x) satisfies A(x) = 1 + x*A(x)^5*A(-x)^4.at n=11A143554
• List of numbers that are both pentagonal (A000326) and binomial coefficients C(n,4) (A000332).at n=31A145920
• a(n) = A001512(n)/24 = (5*n+1)*(5*n+2)*(5*n+3)*(5*n+4)/24.at n=9A151989
• Triangle, read by rows, T(n, k) = binomial(n*binomial(n, floor((n-k)/2)), k).at n=32A157109
• Number of ways to choose four points in an n X n grid (or geoplane).at n=6A189345
• Triangle defined by T(n,k) = binomial(n^2, k^2), for n>=0, k=0..n, as read by rows.at n=30A226234
• Doubly pentagonal numbers: a(n) = n*(3*n-2)*(3*n-1)*(3*n+1)/8.at n=16A232713
• a(n) = 5*binomial(9*n+5,n)/(9*n+5).at n=5A234508
• a(n) = Sum_{i+j<=m+1} t_i * t_j, where t_1 < ... < t_m are the totatives of n.at n=46A341063