2878543

Properties

Appears in sequences

• Number of words w of length n such that each letter of the quinary alphabet is used at least once and for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.at n=8A321841
• First of three consecutive primes p,q,r such that p*q + p*r - q*r, p*q - p*r + q*r and -p*q + p*r + q*r are all prime.at n=7A358393
• Prime numbersat n=208673