login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A124120 Number of nonisomorphic Steiner quadruple systems (SQS's) S(3,4,n) on n points. 2
0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 4, 0, 1054163 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,14

LINKS

Table of n, a(n) for n=1..16.

Index entries for sequences related to Steiner systems

EXAMPLE

There are 4 nonisomorphic SQS's on 14 points.

CROSSREFS

A051390 is the official version of this sequence and has all the references etc.

Cf. A124119, A030129, A001201, A030128, A051390.

Sequence in context: A306819 A327113 A051390 * A320742 A093318 A255329

Adjacent sequences:  A124117 A124118 A124119 * A124121 A124122 A124123

KEYWORD

nonn,hard

AUTHOR

N. J. A. Sloane, Nov 30 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 14:32 EDT 2019. Contains 328161 sequences. (Running on oeis4.)