49902

Appears in sequences

• Numbers k such that 9*2^k + 1 is prime.at n=42A002256
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 6 and 9.at n=25A136905
• Expansion of Product_{k>=1} (1 + x^k)^A065958(k).at n=12A301980
• a(n) = number of subsets S of {1,2,...,n} having more than 2 elements such that (sum of least two elements of S) < difference between greatest two elements of S.at n=20A357291