# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a055341 Showing 1-1 of 1 %I A055341 #16 Mar 13 2024 04:41:49 %S A055341 1,3,8,19,37,66,110,172,257,371,518,705,939,1226,1574,1992,2487,3069, %T A055341 3748,4533,5435,6466,7636,8958,10445,12109,13964,16025,18305,20820, %U A055341 23586,26618,29933,33549,37482,41751,46375,51372,56762,62566,68803 %N A055341 Number of mobiles (circular rooted trees) with n nodes and 3 leaves. %H A055341 Index entries for sequences related to mobiles %H A055341 Index entries for linear recurrences with constant coefficients, signature (3,-2,-1,0,1,2,-3,1). %F A055341 G.f.: x^4(-x^4+2x^3+x^2+1)/((1-x^2)(1-x^3)(1-x)^3). %Y A055341 Column 3 of A055340. %K A055341 nonn %O A055341 4,2 %A A055341 _Christian G. Bower_, May 14 2000 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE