

A000019


Number of primitive permutation groups of degree n.
(Formerly M0346 N0130)


17



1, 1, 2, 2, 5, 4, 7, 7, 11, 9, 8, 6, 9, 4, 6, 22, 10, 4, 8, 4, 9, 4, 7, 5, 28, 7, 15, 14, 8, 4, 12, 7, 4, 2, 6, 22, 11, 4, 2, 8, 10, 4, 10, 4, 9, 2, 6, 4, 40, 9, 2, 3, 8, 4, 8, 9, 5, 2, 6, 9, 14, 4, 8, 74, 13, 7, 10, 7, 2, 2, 10, 4, 16, 4, 2, 2, 4, 6, 10, 4, 155, 10, 6, 6, 6, 2, 2, 2, 10, 4, 10, 2
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OFFSET

1,3


COMMENTS

A check found errors in Theißen's data (degree 121 and 125) as well as in Short's work (degree 169).  Alexander Hulpke (hulpke(AT)math.colostate.edu), Feb 19 2002
There is an error at n=574 in the DixonMortimer paper.  Colva M. RoneyDougal.


REFERENCES

CRC Handbook of Combinatorial Designs, 1996, pp. 595ff.
K. Harada and H. Yamaki, The irreducible subgroups of GL_n(2) with n <= 6, C. R. Math. Rep. Acad. Sci. Canada 1, 1979, 7578.
A. Hulpke, Konstruktion transitiver Permutationsgruppen, Dissertation, RWTH Aachen, 1996.
M. W. Short, The Primitive Soluble Permutation Groups of Degree less than 256, LNM 1519, 1992, Springer
C. C. Sims, Computational methods in the study of permutation groups, pp. 169183 of J. Leech, editor, Computational Problems in Abstract Algebra. Pergamon, Oxford, 1970.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
H. Theißen, Eine Methode zur Normalisatorberechnung in Permutationsgruppen mit Anwendungen in der Konstruktion primitiver Gruppen, Dissertation, RWTH, RWTHA, 1997 [But see comment above about errors! ]


LINKS

N. J. A. Sloane, Table of n, a(n) for n=1..2499 [Computed using the GAP command shown below, which uses the results of Colva M. RoneyDougal]
J. D. Dixon and B. Mortimer, The primitive permutation groups of degree less than 1000, Math. Proc. Cambridge Philos. Soc., 103, 213238, 1988 [But see comment above about errors! ]
A. Hulpke, Transitive groups of small degree
A. Hulpke, Constructing transitive permutation groups, J. Symbolic Comput. 39 (2005), 130.
Index entries for sequences related to groups
Index entries for "core" sequences


PROG

(GAP) List([2..2499], NrPrimitiveGroups);
(MAGMA) [NumberOfPrimitiveGroups(i) : i in [1..999]];


CROSSREFS

Cf. A000001, A023675, A023676, A000638, A002106, A005432, A000637.
Sequence in context: A098366 A241306 A162200 * A081177 A007281 A101085
Adjacent sequences: A000016 A000017 A000018 * A000020 A000021 A000022


KEYWORD

nonn,core,nice


AUTHOR

N. J. A. Sloane


EXTENSIONS

More terms and additional references from Alexander Hulpke (Alexander.Hulpke(AT)Math.RWTHAachen.DE)


STATUS

approved



