a(n) is the smallest prime q > a(n-1) such that, for the previous prime p and the following prime r, the fraction (q-p)/(r-q) has denominator prime(n) (or 0, if such a prime does not exist).
A179328
a(n) is the smallest prime q > a(n-1) such that, for the previous prime p and the following prime r, the fraction (q-p)/(r-q) has denominator prime(n) (or 0, if such a prime does not exist).
Terms
- a(0) =3a(1) =23a(2) =139a(3) =293a(4) =1129a(5) =2477a(6) =8467a(7) =30593a(8) =81463a(9) =85933a(10) =190409a(11) =404597a(12) =535399a(13) =840353a(14) =1100977a(15) =2127163a(16) =4640599a(17) =6613631a(18) =6958667a(19) =10343761a(20) =24120233a(21) =49269581a(22) =83751121a(23) =101649649a(24) =166726367a(25) =273469741a(26) =310845683a(27) =568951459
External references
- oeis: A179328