A052280 - OEIS

This site is supported by donations to The OEIS Foundation.

A052280

Number of 4 X 4 stochastic matrices under row and column permutations.

1, 1, 5, 12, 43, 106, 321, 787, 1960 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	EXAMPLE	`There are 5 nonisomorphic 4 X 4 matrices with row and column sums 2:` `[0 0 0 2] [0 0 0 2] [0 0 0 2] [0 0 1 1] [0 0 1 1]` `[0 0 2 0] [0 0 2 0] [0 1 1 0] [0 0 1 1] [0 1 0 1]` `[0 2 0 0] [1 1 0 0] [1 0 1 0] [1 1 0 0] [1 0 1 0]` `[2 0 0 0] [1 1 0 0] [1 1 0 0] [1 1 0 0] [1 1 0 0]`
	CROSSREFS	`Cf. A001496, A052281, A052282.` `Sequence in context: A129795 A187916 A052644 * A195541 A006078 A046612` `Adjacent sequences: A052277 A052278 A052279 * A052281 A052282 A052283`
	KEYWORD	`more,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 06 2000`

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

Last modified February 15 12:14 EST 2012. Contains 205783 sequences.