3,2,5,5,8,10,13,17,21,26,(34),(37)单数项:前两个数的和=后一个数3+5=85+8=138+13=2113+21=34双数项:分别+3,5,7,9,11,2+3=55+5=1010+7=1717+9=2626+11=37
3+2=5 3+5=8 3十10=13,4+13=17 4+17=215+21=26 5+26=(31)6+31=(37) 6+37=(43)