Numbers n with no 4k+3 factors such that the Pell equation x^2 - n y^2 = -1 is insoluble.

A031399

Numbers n with no 4k+3 factors such that the Pell equation x^2 - n y^2 = -1 is insoluble.

Terms

    a(0) =4a(1) =8a(2) =16a(3) =20a(4) =25a(5) =32a(6) =34a(7) =40a(8) =52a(9) =64a(10) =68a(11) =80a(12) =100a(13) =104a(14) =116a(15) =128a(16) =136a(17) =146a(18) =148a(19) =160a(20) =164a(21) =169a(22) =178a(23) =194a(24) =200a(25) =205a(26) =208a(27) =212a(28) =221a(29) =232

External references