This site is supported by donations to The OEIS Foundation.

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A070124 Numbers n such that [A070080(n), A070081(n), A070082(n)] is an acute isosceles integer triangle. 3
 1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 15, 16, 18, 19, 22, 23, 24, 27, 28, 31, 34, 35, 38, 39, 40, 43, 46, 47, 48, 51, 54, 55, 58, 63, 64, 65, 68, 71, 72, 73, 76, 81, 84, 85, 88, 93, 94, 95, 98, 103, 107, 108, 109, 112, 117, 120, 121, 124, 129 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS R. Zumkeller, Integer-sided triangles EXAMPLE a(13)=18: [A070080(18), A070081(18), A070082(18)]=[4=4=4], A070085(18)=4^2+4^2-4^2=16>0. CROSSREFS Cf. A070098, A070126, A070125, A070115, A070118. Sequence in context: A039054 A047519 A070118 * A059097 A047301 A186275 Adjacent sequences:  A070121 A070122 A070123 * A070125 A070126 A070127 KEYWORD nonn AUTHOR Reinhard Zumkeller, May 05 2002 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.