This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A152721 A prime based vector recursion: a(n)={Prime[n+1],Prime[n],Prime[n-1],-Prime[n-2],...,-1,-1}. 0
 -1, 1, -1, 5, -1, -1, 7, -5, -1, -1, 11, -7, -5, -1, -1, 13, -11, -7, -5, -1, -1, 17, -13, -11, -7, -5, -1, -1, 19, -17, -13, -11, -7, -5, -1, -1, 23, -19, -17, -13, -11, -7, -5, -1, -1, 29, -23, -19, -17, -13, -11, -7, -5, -1, -1, 31, -29, -23, -19, -17, -13, -11, -7, -5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS Row sums are: {-1, 0, 3, 0, -3, -12, -21, -36, -51, -68, -95,...} LINKS FORMULA a(n)={Prime[n+1],Prime[n],Prime[n-1],-Prime[n-2],...,-1,-1}. EXAMPLE {-1}, {1, -1}, {5, -1, -1}, {7, -5, -1, -1}, {11, -7, -5, -1, -1}, {13, -11, -7, -5, -1, -1}, {17, -13, -11, -7, -5, -1, -1}, {19, -17, -13, -11, -7, -5, -1, -1}, {23, -19, -17, -13, -11, -7, -5, -1, -1}, {29, -23, -19, -17, -13, -11, -7, -5, -1, -1}, {31, -29, -23, -19, -17, -13, -11, -7, -5, -1, -1} MATHEMATICA b[0] = {-1}; b[1] = {1, -1}; b[n_] := b[n] = Join[{Prime[n + 1 ]}, {-b[n - 1][[1]]}, Table[b[n - 1][[i]], {i, 2, Length[b[n - 1]]}]]; Table[b[n], {n, 0, 10}]; Flatten[%] CROSSREFS Sequence in context: A324385 A111720 A029646 * A132737 A137754 A131404 Adjacent sequences:  A152718 A152719 A152720 * A152722 A152723 A152724 KEYWORD sign AUTHOR Roger L. Bagula, Dec 11 2008 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 15 16:12 EDT 2019. Contains 327078 sequences. (Running on oeis4.)