A sequence of sorted odd primes 3 = p_1 < p_2 < ... < p_m such that p_i-2 divides the product p_1*p_2*...*p_(i-1) of the earlier primes and each prime factor of p_i-1 is a prime factor of twice the product.
A001259
A sequence of sorted odd primes 3 = p_1 < p_2 < ... < p_m such that p_i-2 divides the product p_1*p_2*...*p_(i-1) of the earlier primes and each prime factor of p_i-1 is a prime factor of twice the product.
Terms
- a(0) =3a(1) =5a(2) =7a(3) =17a(4) =19a(5) =37a(6) =97a(7) =113a(8) =257a(9) =401a(10) =487a(11) =631a(12) =971a(13) =1297a(14) =1801a(15) =19457a(16) =22051a(17) =28817a(18) =65537a(19) =157303a(20) =160001
External references
- oeis: A001259