a(n) is the smallest nonnegative integer k where exactly n ordered pairs of positive integers (x, y) exist such that x^2 + y^2 = k.
A328151
a(n) is the smallest nonnegative integer k where exactly n ordered pairs of positive integers (x, y) exist such that x^2 + y^2 = k.
Terms
- a(0) =0a(1) =2a(2) =5a(3) =50a(4) =65a(5) =1250a(6) =325a(7) =31250a(8) =1105a(9) =8450a(10) =8125a(11) =19531250a(12) =5525a(13) =488281250a(14) =105625a(15) =211250a(16) =27625a(17) =305175781250a(18) =71825a(20) =138125a(21) =5281250a(22) =126953125a(24) =160225a(25) =35701250a(26) =1221025a(27) =2442050a(28) =3453125
External references
- oeis: A328151