id:A055609 - OEIS Search Results

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Number of 3 X n binary matrices with no zero rows or columns, up to row and column permutation.

+0
8

1, 5, 17, 42, 91, 180, 328, 565, 930, 1470, 2248, 3344, 4849, 6881, 9579, 13104, 17649, 23442, 30736, 39833, 51074, 64842, 81574, 101766, 125959, 154771, 188883, 229044, 276085, 330926, 394558, 468083, 552696, 649692, 760482, 886602 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`G.f.: x(x^8-x^7-x^6-2x^5+2x^4+x^3-3x^2-2x-1)/((x^3-1)^2(x^2-1)^2*(x-1)^3).`
	CROSSREFS	`Cf. A024206, A002623, A002727.` `Sequence in context: A096741 A111746 A088645 this_sequence A146720 A146640 A100705` `Adjacent sequences: A055606 A055607 A055608 this_sequence A055610 A055611 A055612`
	KEYWORD	`easy,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Jun 03 2000`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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