Let p be the n-th odd prime. a(n) is the least prime congruent to 7 modulo 8 such that Legendre(-a(n), q) = -Legendre(-1, q) for all odd primes q <= p.
A001988
Let p be the n-th odd prime. a(n) is the least prime congruent to 7 modulo 8 such that Legendre(-a(n), q) = -Legendre(-1, q) for all odd primes q <= p.
Terms
- a(0) =7a(1) =7a(2) =127a(3) =463a(4) =463a(5) =487a(6) =1423a(7) =33247a(8) =73327a(9) =118903a(10) =118903a(11) =118903a(12) =454183a(13) =773767a(14) =773767a(15) =773767a(16) =773767a(17) =86976583a(18) =125325127a(19) =132690343a(20) =788667223a(21) =788667223a(22) =1280222287a(23) =2430076903a(24) =10703135983a(25) =10703135983a(26) =10703135983
External references
- oeis: A001988