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A218928 Number of edges in the Hasse diagram of the subgroup lattice of the alternating group. 1
0, 0, 0, 1, 15, 168, 2051, 19305, 283258, 3255913, 46464854, 670282962, 18723796793, 321480817412 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

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. A218927.

Sequence in context: A055660 A121114 A121116 * A202663 A202123 A201087

Adjacent sequences:  A218925 A218926 A218927 * A218929 A218930 A218931

KEYWORD

nonn,more

AUTHOR

Liam Naughton, Nov 12 2012

STATUS

approved

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Last modified June 17 00:17 EDT 2021. Contains 345080 sequences. (Running on oeis4.)