>>733訂正。
P10/a^10=1+10b+(11C2)b^2+(12C3)b^3+(13C4)b^4+(14C5)b^5+(15C6)b^6+(16C7)b^7+(17C8)b^8+(18C9)b^9
=1+10b+55b^2+220b^3+715b^4+2002b^5+5005b^6+11440b^7+24310b^8+48620b^9
P9/a^9=1+9b+(10C2)b^2+(11C3)b^3+(12C4)b^4+(13C5)b^5+(14C6)b^6+(15C7)b^7+(16C8)b^8
=1+9b+45b^2+165b^3+495b^4+1287b^5+(14C6)b^6+(15C7)b^7+(16C8)b^8
P8/a^8=1+8b+36b^2+120b^3+(11C4)b^4+(12C5)b^5+(13C6)b^6+(14C7)b^7
P7/a^7=1+7b+(8C2)b^2+(9C3)b^3+(10C4)b^4+(11C5)b^5+(12C6)b^6
=1+7b+28b^2+84b^3+(10C4)b^4+(11C5)b^5+(12C6)b^6
P6/a^6=1+6b+(7C2)b^2+(8C3)b^3+(9C4)b^4+(10C5)b^5
P5/a^5=1+5b+(6C2)b^2+(7C3)b^3+(8C4)b^4
=1+5b+15b^2+35b^3+56b^4