id:A073351 - OEIS Search Results

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n^2(n+1)(2n+1)^2(7n+1)/36.

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0, 4, 125, 1078, 5220, 18150, 50869, 122500, 263568, 519840, 956725, 1664234, 2762500, 4407858, 6799485, 10186600, 14876224, 21241500, 29730573, 40876030, 55304900, 73749214, 97057125, 126204588, 162307600, 206635000, 260621829 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`Mentioned in a problem on p. 334 of Two-Year College Math. Jnl., Vol. 25, 1994.`
	FORMULA	`a(n)=sum(i=1, n, i^2)sum(i=n+1, 2n, i^2).` `G.f.: x(4+97x+287x^2+159x^3+13x^4)/(1-x)^7.`
	CROSSREFS	`Cf. A007750.` `Sequence in context: A005936 A090082 A068891 this_sequence A068894 A116944 A124260` `Adjacent sequences: A073348 A073349 A073350 this_sequence A073352 A073353 A073354`
	KEYWORD	`nonn`
	AUTHOR	`Michael Somos, Jul 27 2002`

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Last modified September 5 19:27 EDT 2008. Contains 143485 sequences.

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