a(n) = the least positive k such that (n+k)+1 and (n*k)+1 are both squares; or 0 if no such k exists.

A093482

a(n) = the least positive k such that (n+k)+1 and (n*k)+1 are both squares; or 0 if no such k exists.

Terms

    a(0) =0a(1) =0a(2) =5a(3) =20a(4) =3a(5) =0a(6) =0a(7) =55a(8) =215a(9) =0a(10) =13a(11) =0a(12) =11a(13) =0a(14) =209a(15) =1139a(16) =0a(17) =0a(18) =80a(19) =4a(20) =3a(21) =0a(22) =25a(23) =551a(24) =23a(25) =0a(26) =0a(27) =1196a(28) =0a(29) =0

External references