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A218927 Number of edges in the Hasse diagram of the subgroup lattice of the symmetric group. 1
0, 0, 1, 8, 66, 501, 6469, 60428, 926743, 11902600, 240066343, 3677270225, 108748156239, 1980478458627 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..13.

Liam Naughton and Goetz Pfeiffer, Integer sequences realized by the subgroup pattern of the symmetric group, arXiv:1211.1911

Liam Naughton, CountingSubgroups.g

Liam Naughton and Goetz Pfeiffer, Tomlib, The GAP table of marks library

CROSSREFS

Cf. A218925, A218926, A218928.

Sequence in context: A121780 A121779 A051825 * A303485 A121778 A037501

Adjacent sequences:  A218924 A218925 A218926 * A218928 A218929 A218930

KEYWORD

nonn,more

AUTHOR

Liam Naughton, Nov 12 2012

STATUS

approved

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Last modified July 5 03:37 EDT 2020. Contains 335459 sequences. (Running on oeis4.)