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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A131925 2*A002024 - A000012(signed). 1
 1, 5, 3, 5, 7, 5, 9, 7, 9, 7, 9, 11, 9, 11, 9, 13, 11, 13, 11, 13, 11, 13, 15, 13, 15, 13, 15, 13, 17, 15, 17, 15, 17, 15, 17, 15, 17, 19, 17, 19, 17, 19, 17, 19, 17 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Row sums = A077221: (1, 8, 17, 32, 49, 72, 97, ...). LINKS FORMULA 2*A002024 - A000012 (signed + - + -, ... by columns). A002024 = (1; 2,2; 3,3,3; ...); A000012(signed) = (1; -1,1; 1,-1,1; ...). EXAMPLE First few rows of the triangle: 1; 5, 3; 5, 7, 5; 9, 7, 9, 7; 9, 11, 9, 11, 9; 13, 11, 13, 11, 13, 11; 13, 15, 13, 15, 13, 15, 13; .... CROSSREFS Cf. A002024, A000012, A077221. Sequence in context: A092516 A269893 A336055 * A128010 A185046 A114740 Adjacent sequences: A131922 A131923 A131924 * A131926 A131927 A131928 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Jul 29 2007 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 March 25 07:51 EDT 2023. Contains 361511 sequences. (Running on oeis4.)