id:A110326 - OEIS Search Results

Search: id:A110326

Displaying 1-1 of 1 results found.

page 1

Diagonal sums of triangle A110324.

+0
2

1, -1, -3, -2, -11, -3, -23, -4, -39, -5, -59, -6, -83, -7, -111, -8, -143, -9, -179, -10, -219, -11, -263, -12, -311, -13, -363, -14, -419, -15, -479, -16, -543, -17, -611, -18, -683, -19, -759, -20, -839, -21, -923, -22, -1011, -23, -1103, -24, -1199, -25, -1299, -26, -1403, -27, -1511, -28, -1623, -29, -1739 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`G.f.: (1-x-6x^2+x^3+x^4)/((1+x)^3(1-x)^3); a(n)=3a(n-2)-3a(n-4)+a(n-6); a(n)=-(n^2+3n-1)/4-(n^2+n-3)(-1)^n/4.`
	CROSSREFS	`Sequence in context: A096073 A088302 A074199 this_sequence A112061 A013945 A065014` `Adjacent sequences: A110323 A110324 A110325 this_sequence A110327 A110328 A110329`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 20 2005`

page 1

Search completed in 0.002 seconds

Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

AT&T Labs Research