Numbers k such that -3 is a quadratic residue (not necessarily coprime) modulo k, k + 1, k + 2 and k + 3.
A318527
Numbers k such that -3 is a quadratic residue (not necessarily coprime) modulo k, k + 1, k + 2 and k + 3.
Terms
- a(0) =1a(1) =721a(2) =4681a(3) =6121a(4) =6481a(5) =7201a(6) =7561a(7) =9001a(8) =11161a(9) =14401a(10) =16921a(11) =18361a(12) =19441a(13) =20521a(14) =24481a(15) =24841a(16) =27361a(17) =29881a(18) =32761a(19) =36721a(20) =39241a(21) =39601a(22) =42121a(23) =42841a(24) =43201a(25) =47161a(26) =47521a(27) =48241a(28) =49681a(29) =51121
External references
- oeis: A318527