Least number k such that k-th triangular number is the sum of two nonzero squares in exactly n ways.
A274686
Least number k such that k-th triangular number is the sum of two nonzero squares in exactly n ways.
Terms
- a(0) =4a(1) =40a(2) =25a(3) =145a(4) =625a(5) =169a(6) =31249a(7) =985a(8) =2600a(9) =2500a(10) =87890625a(11) =3649a(12) =384199200a(13) =15625a(14) =33124a(15) =6409
External references
- oeis: A274686