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A218924 Number of incidences in the subgroup lattice of the alternating group. 1
1, 1, 1, 3, 18, 85, 657, 4374, 55711, 530502, 6603007, 82736601, 2032940127, 32102236563 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

Liam Naughton, CountingSubgroups.g.

Liam Naughton and Goetz Pfeiffer, Integer sequences realized by the subgroup pattern of the symmetric group, arXiv:1211.1911 [math.GR], 2012.

Liam Naughton and Goetz Pfeiffer, Integer sequences realized by the subgroup pattern of the symmetric group, Journal of Integer Sequences, Vol. 16, (2013), Article 13.5.8.

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

CROSSREFS

Cf. A218921, A218922, A218923.

Sequence in context: A103897 A119424 A301996 * A037295 A290331 A124811

Adjacent sequences:  A218921 A218922 A218923 * A218925 A218926 A218927

KEYWORD

nonn,more

AUTHOR

Liam Naughton, Nov 12 2012

STATUS

approved

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Last modified June 15 04:47 EDT 2021. Contains 345043 sequences. (Running on oeis4.)