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 A055318 Number of labeled trees with n nodes and 6 leaves. 1
 7, 1736, 151704, 8573040, 385363440, 15186346560, 553400527680, 19255141825920, 652932709228800, 21874544352460800, 730877395478630400, 24516805259429683200, 829582077548941516800, 28413517892377153536000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 7,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 7..200 Index entries for sequences related to trees FORMULA (n!/6!)*Stirling2(n-2, n-6). - Vladeta Jovovic, Jan 28 2004 a(n) = n! * (n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(15*n^3 - 240*n^2 + 1265*n - 2192)/4147200. - Vaclav Kotesovec, Jul 25 2014 MATHEMATICA Table[n! * (n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(15*n^3 - 240*n^2 + 1265*n - 2192)/4147200, {n, 7, 20}] (* Vaclav Kotesovec, Jul 25 2014 *) PROG (Magma) [Factorial(n)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(15*n^3 - 240*n^2 + 1265*n - 2192)/4147200: n in [7..25]]; // Vincenzo Librandi, Jul 25 2014 CROSSREFS Column 6 of A055314. Sequence in context: A203012 A203697 A001424 * A117661 A206459 A172937 Adjacent sequences: A055315 A055316 A055317 * A055319 A055320 A055321 KEYWORD nonn AUTHOR Christian G. Bower, May 11 2000 STATUS approved

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Last modified December 4 02:45 EST 2023. Contains 367541 sequences. (Running on oeis4.)