Irregular triangular array: row n lists the numbers D, each being the discriminant of the minimal polynomial of a quadratic irrational represented by a continued fraction with period an n-tuple of 1s and 2s.

A246903

Irregular triangular array: row n lists the numbers D, each being the discriminant of the minimal polynomial of a quadratic irrational represented by a continued fraction with period an n-tuple of 1s and 2s.

Terms

    a(0) =5a(1) =8a(2) =5a(3) =8a(4) =12a(5) =5a(6) =8a(7) =40a(8) =85a(9) =5a(10) =8a(11) =12a(12) =96a(13) =221a(14) =480a(15) =5a(16) =8a(17) =145a(18) =260a(19) =533a(20) =1160a(21) =1300a(22) =2813a(23) =5a(24) =8a(25) =12a(26) =40a(27) =85a(28) =672a(29) =1365

External references