3)
(4.3⁴+1)(4.5⁴+1)(4.7⁴+1)(4.9⁴+1)
(4.2⁴+1)(4.4⁴+1)(4.6⁴+1)(4.8⁴+1)
(4.3⁴+1+4.3²−4.3²)(4.5⁴+1+4.5²−4.5²)(4.7⁴+1+4.7²−4.7²)(4.9⁴+1+4.9²−4.9²)
(4.2⁴+1+4.2²−4.2²)(4.4⁴+1+4.4²−4.4²)(4.6⁴+1+4.6²−4.6²)(4.8⁴+1+4.8²−4.8²)
[(2.3²+1)²−(2.3)²][(2.5²+1)²−(2.5)²][(2.7²+1)²−(2.7)²][(2.9²+1)²−(2.9)²]
[(2.2²+1)²−(2.2)²][(2.4²+1)²−(2.4)²][(2.6²+1)²−(2.6)²][(2.8²+1)²−(2.8)²]
[(2.3²+1)−(2.3)][(2.3²+1)+(2.3)][(2.5²+1)−(2.5)][(2.5²+1)+(2.5)][(2.7²+1)−(2.7)][(2.7²+1)+(2.7)][(2.9²+1)−(2.9)][(2.9²+1)+(2.9)]
[(2.2²+1)−(2.2)][(2.2²+1)+(2.2)][(2.4²+1)−(2.4)][(2.4²+1)+(2.4)][(2.6²+1)−(2.6)][(2.6²+1)+(2.6)][(2.8²+1)−(2.8)][(2.8²+1)+(2.8)]
[13][25][41][61][85][113][145][181]
[5][13][25][41][61][85][113][145]