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A192516 Number of line graphs on [1,...,n]. 0
1, 1, 2, 8, 62, 739, 11660, 229003, 5487341, 157413957, 5310060277, 207442849742, 9266622204859, 468316344074444, 26534795158872607, 1672482335988644162, 116473621430584439236, 8908899406447047324336, 744489132650874081005467 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
Peter Cameron, Thomas Prellberg, Dudley Stark, Asymptotic enumeration of 2-covers and line graphs, Discrete Math. 310 (2010), no. 2, 230-240 (see l_n).
FORMULA
E.g.f. = exp(-x^3/6-x^4/6-x^5/8-x^6/48)*U(x), where U(x) is the e.g.f. for A014500.
CROSSREFS
Cf. A014500.
Sequence in context: A132574 A086903 A161566 * A159476 A230824 A006245
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 03 2011
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)