id:A071009 - OEIS Search Results

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Number of solutions (x,y,z,u,v,w) to x+y+z = u+v+w, 0<=x,y,z,u,v,w<=n-1, x>=y>=z, u>=v>=w.

+0
1

1, 4, 16, 48, 119, 256, 500, 900, 1525, 2456, 3796, 5664, 8207, 11588, 16004, 21672, 28845, 37800, 48856, 62356, 78691, 98280, 121592, 149128, 181445, 219132, 262840, 313256, 371131, 437256, 512492, 597740, 693977, 802224, 923580 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`Recurrence: a(n) = 3a(n-1)-a(n-2)-4a(n-3)+2a(n-4)+2a(n-5)+2a(n-6)-4a(n-7)-a(n-8)+3a(n-9)-a(n-10). G.f.: x(1+x+5x^2+8x^3+5*x^4+x^5+x^6)/(1+x+x^2)/(1+x)^2/(1-x)^6.`
	CROSSREFS	`Cf. A071816.` `Sequence in context: A050616 A006009 A100625 this_sequence A131126 A058922 A034918` `Adjacent sequences: A071006 A071007 A071008 this_sequence A071010 A071011 A071012`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)Eunet.yu), Jun 10 2002`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

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