98099

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 63 ones.at n=9A031831
• Numbers x such that sigma(x)-x divides x-1, other than prime powers.at n=21A059047
• Number of Motzkin paths of length n with no level steps at even level.at n=17A090345
• a(n) = Sum_{k=0..floor(n/2)} binomial(n-k,k)*A000108(k+1).at n=15A185087