Minimal k > n such that (4k+3n)(4n+3k) is a square.

Terms

a(0) =393a(1) =786a(2) =1179a(3) =109a(4) =1965a(5) =2358a(6) =2751a(7) =218a(8) =3537a(9) =3930a(10) =4323a(11) =327a(12) =132a(13) =5502a(14) =5895a(15) =436a(16) =6681a(17) =7074a(18) =7467a(19) =545a(20) =8253a(21) =8646a(22) =9039a(23) =157a(24) =9825a(25) =264a(26) =10611a(27) =763a(28) =11397a(29) =11790