Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 4.
A031417
Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 4.
Terms
- a(0) =274a(1) =370a(2) =481a(3) =797a(4) =953a(5) =1069a(6) =1249a(7) =1313a(8) =1378a(9) =1381a(10) =1514a(11) =1657a(12) =1658a(13) =1733a(14) =1889a(15) =2125a(16) =2297a(17) =2377a(18) =2554a(19) =2557a(20) =2833a(21) =2834a(22) =2929a(23) =2941a(24) =3226a(25) =3329a(26) =3338a(27) =3433a(28) =3541a(29) =3761
External references
- oeis: A031417