A304919 Number of labeled hyperforests spanning {1,...,n} and allowing singleton edges.

1, 1, 5, 45, 665, 14153, 399421, 14137301, 603647601, 30231588689, 1738713049013, 112976375651901, 8186616300733321, 654642360222892057, 57267075701210437229, 5440407421313402397541, 557802495215406348358113, 61393838258161429159571873, 7220049654850517272144419941, 903546142463635579042416518989

Offset: 0

Author

Gus Wiseman, May 21 2018

Keywords

• nonn

Examples

			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.

Formula

Inverse binomial transform of A134956.