id:A070098 - OEIS Search Results

Search: id:A070098

Displaying 1-1 of 1 results found.

page 1

Number of integer triangles with perimeter n which are acute and isosceles.

+0
7

0, 0, 1, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 2, 3, 3, 4, 3, 4, 4, 4, 4, 5, 4, 5, 5, 6, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 7, 8, 8, 8, 8, 9, 9, 9, 9, 10, 9, 10, 10, 11, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 14, 15, 15, 16, 15 (list; graph; listen)

	OFFSET	`1,9`
	COMMENT	`a(n)=A070093(n)-A024154(n); a(n)=A059169(n)-A070106(n).`
	LINKS	`R. Zumkeller, Integer-sided triangles`
	EXAMPLE	`For n=9 there are A005044(9)=3 integer triangles: [1,4,4], [2,3,4], and [3,3,3]; both isosceles are also acute.`
	CROSSREFS	`Cf. A070080, A070081, A070082, A059169, A070099, A070100, A070124.` `Sequence in context: A086833 A010764 A029383 this_sequence A029233 A051888 A088019` `Adjacent sequences: A070095 A070096 A070097 this_sequence A070099 A070100 A070101`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002`

page 1

Search completed in 0.002 seconds

Last modified September 8 13:07 EDT 2008. Contains 143486 sequences.

AT&T Labs Research