找规律题a=11,b=60,c=61a=13,b=84,c=85a=2n+1,b=[n(2n+2)]=2n^2+2n,c=2n^2+2n+1
(2N＋1）＊N＋N，(2N＋1）＊N＋N＋1 ，2N＊N
60,61，84,852n(n+1),2n(n+1)+1
切！
