a(n) is the smallest integer k > n such that sqrt(1/n + 1/k) is a rational number; or 0 if no such k exists.
A379815
a(n) is the smallest integer k > n such that sqrt(1/n + 1/k) is a rational number; or 0 if no such k exists.
Terms
- a(0) =0a(1) =16a(2) =9a(3) =0a(4) =20a(5) =12a(6) =441a(7) =64a(8) =16a(9) =90a(10) =1089a(11) =36a(12) =4212a(13) =98a(14) =225a(15) =0a(16) =272a(17) =144a(18) =549081a(19) =25a(20) =567a(21) =2156a(22) =13225a(23) =48a(24) =144a(25) =650a(26) =81a(27) =98a(28) =142100a(29) =150
External references
- oeis: A379815