Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 3.

A031406

Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 3.

Terms

    a(0) =11a(1) =19a(2) =23a(3) =40a(4) =87a(5) =96a(6) =152a(7) =159a(8) =216a(9) =219a(10) =235a(11) =335a(12) =336a(13) =344a(14) =392a(15) =415a(16) =455a(17) =515a(18) =535a(19) =567a(20) =592a(21) =615a(22) =688a(23) =707a(24) =747a(25) =816a(26) =848a(27) =875a(28) =888a(29) =920

External references