Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 23.
A031521
Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 23.
Terms
- a(0) =531a(1) =547a(2) =563a(3) =571a(4) =587a(5) =599a(6) =603a(7) =607a(8) =619a(9) =623a(10) =2120a(11) =2144a(12) =2152a(13) =2176a(14) =2216a(15) =2240a(16) =2344a(17) =2368a(18) =2432a(19) =2440a(20) =2496a(21) =4767a(22) =4839a(23) =4911a(24) =4983a(25) =5055a(26) =5127a(27) =5199a(28) =5271a(29) =5487
External references
- oeis: A031521