a(n) is twice the coefficient of the radical part in the fundamental unit of Q(sqrt(A000037(n))) where A000037 lists the nonsquare numbers (Version 1).

A048942

a(n) is twice the coefficient of the radical part in the fundamental unit of Q(sqrt(A000037(n))) where A000037 lists the nonsquare numbers (Version 1).

Terms

    a(0) =2a(1) =2a(2) =1a(3) =4a(4) =6a(5) =1a(6) =2a(7) =6a(8) =1a(9) =1a(10) =8a(11) =2a(12) =2a(13) =8a(14) =78a(15) =1a(16) =1a(17) =84a(18) =10a(19) =2a(20) =2a(21) =10a(22) =3a(23) =1a(24) =4a(25) =546a(26) =1a(27) =8a(28) =12a(29) =2

External references