id:A129392 - OEIS Search Results

Search: id:A129392

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Triangle read by rows: T(r,c)=T(r,c-1)+T(r,c+1)+T(r-1,c-1).

+0
5

1, 1, 3, 1, 1, -5, -7, -5, 1, 1, 7, 5, 3, 5, 7, 1, 1, 3, 1, -9, -15, -9, 1, 3, 1, 1, -33, -35, -5, 29, 43, 29, -5, -35, -33, 1, 1, 91, 89, 31, -23, -49, -55, -49, -23, 31, 89, 91, 1, 1, -137, -139, -93, -43, 19, 85, 115, 85, 19, -43, -93, -139, -137, 1, 1, 51, 49, 135, 225, 183, 1, -201, -287, -201, 1, 183, 225, 135, 49, 51, 1, 1, 399 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`All edge elements are 1 and the triangle is symmetric about the central line. For all elements x inside the triangle` `..a..` `.bxc.` `we have x=a+b+c. The triangle is symmetric. The top of the triangle thus is` `........1` `.....1..3..1` `..1.-5.-7.-5..1` `1..7..5..3..5..7..1`
	LINKS	`R. J. Mathar, Comments on A129392, A129394 and A129396` `R. J. Mathar, OEIS A129392 (PDF).`
	CROSSREFS	`Cf. A129393, A129394, A129396, A129398.` `Sequence in context: A099608 A047969 A047812 this_sequence A118538 A141523 A086385` `Adjacent sequences: A129389 A129390 A129391 this_sequence A129393 A129394 A129395`
	KEYWORD	`sign,tabf`
	AUTHOR	`Jonas Wallgren (jonwa(AT)ida.liu.se), Apr 13 2007`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 17 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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