27445

Appears in sequences

• Sums of members of groups in A076063.at n=37A076066
• Number of partitions of n with at most two even parts.at n=47A096778
• a(n)= least number k > a(n-1) such that k*(2^p-1)*(k*(2^p-1)+1)-1 is prime, where p = A000043(n) = Mersenne exponents.at n=24A200655
• G.f.: exp( Sum_{n>=1} (3*n)!/(3!*n!^3) * x^n/n ).at n=5A229452
• Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 5.at n=14A242503
• Smallest number k >= A000043(n) such that k*A000668(n)*(k*A000668(n)+1)-1 is prime.at n=24A249509