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A075744 Hierarchies of hierarchies. 3
1, 1, 5, 36, 338, 3898, 53173, 835992, 14864340, 294606273, 6434871231, 153473830678, 3966604562709, 110386840008838, 3289768253831145, 104502173165838799, 3523895395660532937, 125689588963370029163, 4726867751402704638366, 186902021178952943036080 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Stirling transform of A084357 = number of sets of sets of lists. - Thomas Wieder, Jun 19 2005

LINKS

T. D. Noe, Table of n, a(n) for n=0..100

FORMULA

E.g.f.: exp(f(x)-1) where f(x) = e.g.f. for A075729.

CROSSREFS

Cf. A075729, A075756.

Cf. A084357.

Sequence in context: A278990 A127132 A141764 * A277610 A261899 A109186

Adjacent sequences:  A075741 A075742 A075743 * A075745 A075746 A075747

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 15 2002

STATUS

approved

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Last modified February 22 09:55 EST 2019. Contains 320390 sequences. (Running on oeis4.)