A218928 Number of edges in the Hasse diagram of the subgroup lattice of the alternating group.

0, 0, 0, 1, 15, 168, 2051, 19305, 283258, 3255913, 46464854, 670282962, 18723796793, 321480817412

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