A027845 - OEIS

This site is supported by donations to The OEIS Foundation.

A027845

Number of subgroups of index n in fundamental group of a certain fiber space.

1, 15, 43, 371, 1321, 11979 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	REFERENCES	`V. A. Liskovets and A. Mednykh, Enumeration of subgroups in the fundamental groups of orientable circle bundles over surfaces, Commun. in Algebra, 28, No. 4 (2000), 1717-1738.`
	CROSSREFS	`Sequence in context: A126369 A193647 A133343 * A201810 A029827 A119123` `Adjacent sequences: A027842 A027843 A027844 * A027846 A027847 A027848`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 21:56 EST 2012. Contains 205860 sequences.