A001988 - cp's OEIS frontend

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.

n	a(n)
1	7
2	7
3	127
4	463
5	463
6	487
7	1423
8	33247
9	73327
10	118903
11	118903
12	118903
13	454183
14	773767
15	773767
16	773767
17	773767
18	86976583
19	125325127
20	132690343
21	788667223
22	788667223
23	1280222287
24	2430076903
25	10703135983
26	10703135983
27	10703135983

[7, 7, 127, 463, 463, 487, 1423, 33247, 73327, 118903, 118903, 118903, 454183, 773767, 773767, 773767, 773767, 86976583, 125325127, 132690343, 788667223, 788667223, 1280222287, 2430076903, 10703135983, 10703135983, 10703135983]

cp's OEIS Frontend

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.

Table of values

List of values