A225772 Number of 2-element sets of mapping patterns from n points to themselves; the number of 2-element sets of transformations on n points up to conjugation.
0, 4, 67, 1455, 41829, 1540566, 68342769, 3540690574, 209612913688, 13957423185476, 1032436318249157, 83993175608836193, 7453446303042081363, 716451740543945322472, 74159075140708643215135
Offset: 1
Keywords
Links
- J. D. Mitchell, Semigroups data (contains links to files containing the 2-element sets of transformations on n points up to conjugation)
Formula
Extensions
Added more terms, James Mitchell, Oct 29 2013