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 A304919 Number of labeled hyperforests spanning {1,...,n} and allowing singleton edges. 0
 1, 1, 5, 45, 665, 14153, 399421, 14137301, 603647601, 30231588689, 1738713049013, 112976375651901, 8186616300733321, 654642360222892057, 57267075701210437229, 5440407421313402397541, 557802495215406348358113, 61393838258161429159571873, 7220049654850517272144419941, 903546142463635579042416518989 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Table of n, a(n) for n=0..19. FORMULA Inverse binomial transform of A134956. EXAMPLE The a(2) = 5 hyperforests are the following: {{1,2}} {{1},{2}} {{1},{1,2}} {{2},{1,2}} {{1},{2},{1,2}} CROSSREFS Cf. A030019, A035053, A048143, A134954, A134955, A134956, A134957, A134959, A144959, A303838, A304717, A304867, A304911, A304912, A304918. Sequence in context: A365604 A085356 A113382 * A132688 A295227 A167812 Adjacent sequences: A304916 A304917 A304918 * A304920 A304921 A304922 KEYWORD nonn AUTHOR Gus Wiseman, May 21 2018 STATUS approved

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Last modified August 6 23:00 EDT 2024. Contains 375002 sequences. (Running on oeis4.)