Posted by Kenzie on Tuesday, February 7, 2012 at 9:05pm.
what are the next 3 numbers after 1,+4,9,+16

Math  Reiny, Tuesday, February 7, 2012 at 10:55pm
looks like we are taking the perfect squares and alternating them  and +

Math  Bosnian, Tuesday, February 7, 2012 at 10:55pm
A perfect square is any rational number that is the square of another rational number.
1 ^ 2 = 1
2 ^ 2 = 4
5 ^ 2 = 25
6 ^ 2 = 36
7 ^ 2 = 49
etc.
Your series is a perfect square with negative odd numbers.
The next 3 numbers are :
 25 , 36 ,  49
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