A174134 Nonnegative integers m such that m^2 = (a^2-1)*(b^2+1) for some integers a,b.

0, 4, 20, 24, 60, 116, 120, 136, 140, 260, 340, 360, 444, 676, 696, 700, 816, 1040, 1476, 2020, 2220, 2280, 2684, 3480, 3940, 4056, 4060, 4080, 4420, 4756, 5516, 6100, 6120, 6460, 6780, 8224, 8840, 8976, 9860, 11700, 13756, 16040, 18564, 21340, 22964

Offset: 1

Author

Max Alekseyev, Apr 01 2010

Keywords

• nonn

Comments

m belongs to this sequence iff m^2 belongs to A174133.

All terms are multiples of 4.