A218927 Number of edges in the Hasse diagram of the subgroup lattice of the symmetric group.

0, 0, 1, 8, 66, 501, 6469, 60428, 926743, 11902600, 240066343, 3677270225, 108748156239, 1980478458627

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