圖片參考：http://imgcld.yimg.com/8/n/HA07325241/o/701205290039113873409730.jpg
http://imgcld.yimg.com/8/n/HA07325241/o/701205290039113873409731.jpg
更新1:
更正: Prove or disprove a(n)-1 is divisble by 2n^2-2x+1 for all positive integers n.
更新2:
更正: Prove or disprove a(n)-1 is divisble by 2n^2-2n+1 for all positive integers n.
