27503

Appears in sequences

• Expansion of Product_{m>=1} (1+m*q^m)^-21.at n=6A022713
• Triangle read by rows of numbers b_{n,k}, n >= 2, 1 <= k < n such that (1/(1-q*t))*Product_{n,k} 1/(1 - q^n*t^k)^b_{n,k} = Sum_{i,j>=1} S_{i,j} q^i*t^j where S_{i,j} are entries in the table A008277 (the inverse Euler transformation of the table of Stirling numbers of the second kind).at n=47A112339
• Triangle read by rows of numbers b_{n,k}, n>=1, 1<=k<=n such that Product_{n,k} 1/(1-q^n t^k)^{b_{n,k}} = 1 + Sum_{i,j>=1} S_{i,j} q^i t^j where S_{i,j} are entries in the table A008277 (the inverse Euler transformation of the table of Stirling numbers of the second kind).at n=57A112340
• Numbers such that the digital sums in bases 2, 3, 5 and 7 all are equal.at n=30A135127
• Numbers that are the product of two distinct primes and they are partial sum of products of two distinct primes.at n=34A168476
• Numbers k such that 4^k + 7 is prime.at n=39A217349