1127843

Appears in sequences

• Product of twin primes of form (4*k+1,4*k+3), k>0.at n=20A071697
• Records in A166133.at n=22A256403
• Consider numbers n such that A166133(n) sets a new record and also satisfies A166133(n)=A166133(n-1)^2-1; sequence gives values of A166133(n).at n=7A256423
• Semiprimes p*q for which p and q are successive primes and their binary representations differ from each other in one bit position only.at n=48A261080
• Interprimes that are products of two successive primes.at n=12A354682