3 . by considering the enumerative problem of animals resulting from the stacking of labeled squares on a single staircase , we introduce the new concept of the fibonacci - like numbers and lucas - like numbers , and discuss their combinatorial properties and the computed method of mean values and mean - square for this enumerative problem 通過考慮單階梯上標(biāo)號方塊latticeanimals的計(jì)數(shù)問題,引入了一類fibonacci - like數(shù)與lucas - like數(shù)的新概念,討論了它們的組合性質(zhì),得到了此計(jì)數(shù)問題的均值與均方差的計(jì)算方法。