How many multiples of 18 are less than 3500 and are 2 more than the square of a natural number?

1) 6
2) 7
3) 5
4) 8

• 7
  4^2+2, 14^2+2, 22^2+2, 32^2+2, 40^2 +2,50^2 +2, 58^2 + 2
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