5909761

Appears in sequences

• Numerator of (binomial(2*n-2,n-1)/n!)^2.at n=9A004936
• a(n) = A002596(n)^2.at n=10A056981
• a(n) is the smallest integer such that all its prime factors are <= its n-th root, and such that the equivalent limitation holds also for a(n)-1.at n=4A122463
• Products of squares of three successive primes.at n=4A258155
• Irregular triangle read by rows: T(n,d) (n >= 1, d <= n-1 for n>1) = number of n X n integer-valued matrices M such that M_{1,1}=0, M_{n,n}=d, M_{(i+1),j} = M_{i,j} + (0 or 1), M_{i,(j+1)} = M_{i,j} + (0 or 1), and M_{(i+1),(j+1)} = M_{i,j} + (0 or 1).at n=21A323848