Numbers k such that the distance between the k-th triangular number and the nearest square is exactly 1.

A229131

Numbers k such that the distance between the k-th triangular number and the nearest square is exactly 1.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =5a(4) =15a(5) =25a(6) =32a(7) =90a(8) =148a(9) =189a(10) =527a(11) =865a(12) =1104a(13) =3074a(14) =5044a(15) =6437a(16) =17919a(17) =29401a(18) =37520a(19) =104442a(20) =171364a(21) =218685a(22) =608735a(23) =998785a(24) =1274592a(25) =3547970a(26) =5821348a(27) =7428869a(28) =20679087a(29) =33929305

External references