来自在线整数百科全书的问候语!http://oeis.org/ Search: id:a151672 Showing 1-1 of 1 %I A151672 %S A151672 1,4,0,4,16,0,0,0,0,4,16,0,16,64,0,0,0,0,0,0,0,0,0,0,0,0,0,4,16,0,16, %T A151672 64,0,0,0,0,16,64,0,64,256,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %U A151672 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,16,0,16,64,0,0,0,0,16,64,0,64,256,0 %N A151672 G.f.: Prod_{k >= 0} (1+4*x^(3^k)). %H A151672 David Applegate, Omar E. Pol and N. J. A. Sloane,基于细胞自动机的牙签序列及其他序列国会议员,第206卷(2010),157—191页。[定理6中有一个类型:(13)应该读取u(n)=4.3 ^(Wt(n-1)-1),对于n>=2。OEIS中的Toothpick目录和元胞自动机序列%Y A151672 For generating functions Prod_{k>=0} (1+a*x^(b^k)) for the following values of (a,b) see: (1,2) A000012 and A000027, (1,3) A039966 and A005836, (1,4) A151666 and A000695, (1,5) A151667 and A033042, (2,2) A001316, (2,3) A151668, (2,4) A151669, (2,5) A151670, (3,2) A048883, (3,3) A117940, (3,4) A151665, (3,5) A151671, (4,2) A102376, (4,3) A151672, (4,4) A151673, (4,5) A151674. %K A151672 nonn %O A151672 0,2 %A A151672 _N. J. A. Sloane_, May 30 2009 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE