Lesser of a pair (x,y) of consecutive terms of A045572 (numbers coprime to 2*5), both semiprimes and such that the prime factors of x are adjacent primes to the factors of y.
A213605
Lesser of a pair (x,y) of consecutive terms of A045572 (numbers coprime to 2*5), both semiprimes and such that the prime factors of x are adjacent primes to the factors of y.
Terms
- a(0) =403a(1) =1003a(2) =110203a(3) =118003a(4) =418307a(5) =429491a(6) =439097a(7) =559003a(8) =1239869a(9) =1887239a(10) =2481463a(11) =2502977a(12) =3381403a(13) =3693419a(14) =5646257a(15) =6120403a(16) =6586003a(17) =6954767a(18) =7042661a(19) =8350003a(20) =11305093a(21) =13083403a(22) =13760203a(23) =17297519a(24) =21159419
External references
- oeis: A213605