A175034 Offsets i such that i + n*(n+1)/2 is never a perfect square for any n>0.

2, 5, 7, 11, 12, 14, 17, 18, 20, 23, 27, 29, 31, 32, 37, 38, 40, 41, 42, 44, 47, 50, 51, 52, 56, 57, 59, 62, 65, 67, 68, 69, 70, 73, 74, 77, 82, 83, 84, 86, 87, 88, 92, 95, 96, 98, 101, 102, 104, 107, 109, 110, 112, 113, 117, 119, 122, 125, 126, 127, 128, 131, 132, 135, 137, 139

Offset: 1

Author

Ctibor O. Zizka, Nov 10 2009

Keywords

• easy
• nonn

Comments

Complement of A175035.

Crossrefs

Cf. A001108, A006451, A154138, A154139, A154140, A154141

Extensions

Extended by R. J. Mathar, Nov 26 2009