521855

Appears in sequences

• Binomial coefficients C(n,57).at n=4A017721
• Binomial coefficients C(61,n).at n=4A017777
• Binomial coefficients binomial(2*n-3,4).at n=28A053126
• Doubly pentagonal numbers: a(n) = n*(3*n-2)*(3*n-1)*(3*n+1)/8.at n=20A232713
• Number of intersections of diagonals in the interior of a regular p-gon where p is the n-th prime.at n=17A262248