Smallest square k > 0 such that n*k + 1 is also a square or 0 if no such term exists, i.e., when n is a square.

A069018

Smallest square k > 0 such that n*k + 1 is also a square or 0 if no such term exists, i.e., when n is a square.

Terms

    a(0) =0a(1) =4a(2) =1a(3) =0a(4) =16a(5) =4a(6) =9a(7) =1a(8) =0a(9) =36a(10) =9a(11) =4a(12) =32400a(13) =16a(14) =1a(15) =0a(16) =64a(17) =16a(18) =1521a(19) =4a(20) =144a(21) =1764a(22) =25a(23) =1a(24) =0a(25) =100a(26) =25a(27) =576a(28) =3312400a(29) =4

External references