The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A134958 Number of hypertrees with n labeled vertices: analog of A030019 when edges of size 1 are allowed (with no two equal edges). 10
 1, 2, 4, 32, 464, 9952, 284608, 10207360, 441006336, 22312355840, 1294525492224, 84749726259200, 6181332806029312, 497099907500220416, 43702202601439608832, 4169993748235341529088, 429217455330896263577600, 47406138617171801211797504 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..338 FORMULA Equals 2^n*A030019(n). MAPLE a:= n-> 2^n*`if`(n=0, 1, add(Stirling2(n-1, i)*n^(i-1), i=0...n-1)): seq(a(n), n=0..18); # Alois P. Heinz, Aug 21 2019 CROSSREFS Sequence in context: A144937 A009110 A225170 * A101460 A304862 A118992 Adjacent sequences: A134955 A134956 A134957 * A134959 A134960 A134961 KEYWORD nonn AUTHOR Don Knuth, Jan 26 2008 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified July 13 11:10 EDT 2024. Contains 374282 sequences. (Running on oeis4.)