id:A050531 - OEIS Search Results

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Number of multigraphs with loops on 3 nodes with n edges.

+0
6

1, 2, 6, 14, 28, 52, 93, 152, 242, 370, 546, 784, 1103, 1512, 2040, 2706, 3534, 4554, 5803, 7304, 9108, 11252, 13780, 16744, 20205, 24206, 28826, 34126, 40176, 47056, 54857, 63648, 73542, 84630, 97014, 110808, 126139, 143108, 161868, 182546 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (x^6+x^4+2x^3+x^2+1)/((x^3-1)^2(x^2-1)^2*(x-1)^2).`
	CROSSREFS	`Cf. A002620.` `Sequence in context: A101586 A121968 A033547 this_sequence A027083 A123991 A112511` `Adjacent sequences: A050528 A050529 A050530 this_sequence A050532 A050533 A050534`
	KEYWORD	`easy,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)Eunet.yu), Dec 29 1999`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research