id:A105374 - OEIS Search Results

Search: id:A105374

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4n^3 + 4n.

+0
2

0, 8, 40, 120, 272, 520, 888, 1400, 2080, 2952, 4040, 5368, 6960, 8840, 11032, 13560, 16448, 19720, 23400, 27512, 32080, 37128, 42680, 48760, 55392, 62600, 70408, 78840, 87920, 97672, 108120, 119288, 131200, 143880, 157352, 171640, 186768 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`For n>1, the number of straight lines with n points in a 4-dimensional hypercube of with n points on each edge is 4n^3+12n^2+16n+8, i.e. A105374(n+1).`
	FORMULA	`a(n) = A002522(n)*A008586(n).`
	EXAMPLE	`a(5) = 45^3 + 45 = 500+20 = 520.`
	CROSSREFS	`Essentially row or column of A102728 and A105374.` `Sequence in context: A014642 A143943 A135796 this_sequence A162668 A028596 A125198` `Adjacent sequences: A105371 A105372 A105373 this_sequence A105375 A105376 A105377`
	KEYWORD	`easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Apr 02 2005`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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