68635477

Appears in sequences

• Witt vector *2!/2!.at n=16A006177
• Number of binary Lyndon words containing n letters of each type; periodic binary sequences of period 2n with n zeros and n ones in each period.at n=17A022553
• (binomial(2*p,p)-2)/(2*p) where p runs through the primes.at n=6A086655
• Formal infinite product representation for the Catalan numbers (A000108) o.g.f. series.at n=16A157161
• Product_{n>=1} (1+x^n)^a(n) = Sum_{k>=0} C(k)*x^k, where C(k) = A000108(k).at n=16A378424