A218923 Number of incidences in the subgroup lattice of the symmetric group.

1, 1, 3, 11, 68, 262, 2261, 14032, 176245, 1821103, 30883491, 415843982, 10779423937, 177718085432

Offset

0,3

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, A218924.

Sequence in context: A173235 A201259 A177008 * A342436 A342394 A342370

Adjacent sequences: A218920 A218921 A218922 * A218924 A218925 A218926

Keyword

nonn,more

Author

Liam Naughton, Nov 12 2012

Status

approved