The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A155076 Triangle read by rows. The main diagonal is positive. If rowindex >= 2*columnindex then -1 else 0. 1
 1, -1, 1, -1, 0, 1, -1, -1, 0, 1, -1, -1, 0, 0, 1, -1, -1, -1, 0, 0, 1, -1, -1, -1, 0, 0, 0, 1, -1, -1, -1, -1, 0, 0, 0, 1, -1, -1, -1, -1, 0, 0, 0, 0, 1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 1, -1, -1, -1, -1, -1, -1, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Matrix inverse of this triangle is A155077. LINKS Table of n, a(n) for n=1..85. EXAMPLE Table begins: 1, -1,1, -1,0,1, -1,-1,0,1, -1,-1,0,0,1, -1,-1,-1,0,0,1, -1,-1,-1,0,0,0,1, -1,-1,-1,-1,0,0,0,1, -1,-1,-1,-1,0,0,0,0,1, CROSSREFS Cf. A000123. Sequence in context: A304569 A135839 A071022 * A328308 A257196 A176137 Adjacent sequences: A155073 A155074 A155075 * A155077 A155078 A155079 KEYWORD sign,tabl AUTHOR Mats Granvik, Gary W. Adamson, Jan 19 2009 STATUS approved

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

Last modified September 24 00:14 EDT 2023. Contains 365554 sequences. (Running on oeis4.)