40049

Appears in sequences

• Expansion of 1/(1-2*x^2-3*x^3).at n=18A002447
• Numbers k such that the continued fraction for sqrt(k) has period 97.at n=26A020436
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 57.at n=0A031645
• Numbers k such that (2*k)!/(2*(k!)^2) - 1 is prime.at n=33A112861
• Least number having exactly two odd prime factors that differ by 2*n^2.at n=25A190052
• Smallest k such that tau(k)=reversal(k-n).at n=48A241474
• Numbers with three or more digits such that every three consecutive digits are a nonzero square.at n=40A365820