id:A134958 - OEIS Search Results

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Number of hypertrees with n labeled vertices: analogue of A030019 when edges of size 1 are allowed (with no two equal edges).

+0
2

1, 2, 4, 32, 464, 9952, 284608, 10207360, 441006336, 22312355840, 1294525492224, 84749726259200, 6181332806029312, 497099907500220416, 43702202601439608832, 4169993748235341529088, 429217455330896263577600, 47406138617171801211797504 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`Equals 2^n*A030019(n).`
	CROSSREFS	`Sequence in context: A075070 A085055 A009110 this_sequence A101460 A118992 A062740` `Adjacent sequences: A134955 A134956 A134957 this_sequence A134959 A134960 A134961`
	KEYWORD	`nonn`
	AUTHOR	`D. E. Knuth, Jan 26 2008`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

AT&T Labs Research