id:A054497 - OEIS Search Results

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Number of symmetric nonnegative integer 7x7 matrices with sum of elements equal to 4*n, under action of dihedral group D_4.

+0
1

1, 7, 31, 105, 300, 756, 1732, 3676, 7330, 13870, 25102, 43714, 73612, 120340, 191620, 298012, 453739, 677677, 994565, 1436435, 2044328, 2870296, 3979768, 5454280, 7394660, 9924668, 13195196, 17389028, 22726280, 29470520, 37935704 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: 1/((1-x)^7*(1-x^2)^3).`
	CROSSREFS	`Cf. A001753, A038163.` `Sequence in context: A055899 A139876 A107392 this_sequence A119359 A055366 A109756` `Adjacent sequences: A054494 A054495 A054496 this_sequence A054498 A054499 A054500`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), May 14 2000`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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