来自在线整数百科全书的问候语!http://oeis.org/ Search: id:a003244 Showing 1-1 of 1 %I A003244 M0759 %S A003244 1,1,1,2,3,6,9,16,23,35,51,72,97,136,186,230,321,401,526,647,844,1000, %T A003244 1331,1539,1960,2299,2943,3307,4237,4779,5961,6744,8372,9239,11605, %U A003244 12694,15549,17264,21086,22784,27976,30357,36598,39843,47821 %N A003244 Number of unrooted achiral trees with n nodes. %D A003244 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A003244 F. Harary and R. W. Robinson,非手性树数J. Reine Angew。数学,278(1975),32-335.%%H AA33244 F. Harary和R. W. Robinson,非手性树数J. Reine Angew。数学,278(1975),32-335。(注释扫描的副本)%%A000 3244与树相关的序列的索引条目在生成函数方面:%A33244:a00 3244(x)=a00 3241(x)-(p^ 2(x)-p(x^ 2))/(2×x ^ 2),其中p(x)=x*a00 338(x)。[哈拉里和鲁滨孙情商45 ]。- 9月28日R.J.MathARGI,9月28日2011‰KAA33244 NON,易%%O A33244,1,4%AAA33244,N.J.A.SLaNeNeE.E%A33244,由Y.R.J.MathARiz扩展,9月28日2011μl内容在OEIS最终用户许可协议下可用:HTTP:/OEIS.Org/许可证