3Â Â Â Â Â Â Â Â Â 6Â Â Â Â Â Â Â Â Â 18Â Â Â Â Â 149Â Â Â Â Â Â Â Â 602Â Â Â Â Â Â Â Â 15057
The series is 3 × 1² + 3 = 6, 6 × 2 + 4 = 16, 16 × 3² + 5 = 149, 149 × 4 + 6 = 602, 602 × 5² + 7 = 15057,... Therefore it should be 16 in place of 18.
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