Numbers k such that the central binomial coefficient C(2k,k) is divisible by k^2.

Terms

a(0) =1a(1) =924a(2) =1287a(3) =2002a(4) =2145a(5) =3366a(6) =3640a(7) =3740a(8) =4199a(9) =6006a(10) =6118a(11) =6552a(12) =7480a(13) =7920a(14) =8580a(15) =8855a(16) =10465a(17) =10920a(18) =11385a(19) =11592a(20) =12285a(21) =12325a(22) =12441a(23) =12540a(24) =12597a(25) =12920a(26) =13224a(27) =13398a(28) =13566a(29) =15080