Numbers k such that 13*k+1 is a square.

Terms

a(0) =0a(1) =11a(2) =15a(3) =48a(4) =56a(5) =111a(6) =123a(7) =200a(8) =216a(9) =315a(10) =335a(11) =456a(12) =480a(13) =623a(14) =651a(15) =816a(16) =848a(17) =1035a(18) =1071a(19) =1280a(20) =1320a(21) =1551a(22) =1595a(23) =1848a(24) =1896a(25) =2171a(26) =2223a(27) =2520a(28) =2576a(29) =2895