

A158894


Sawtooth pattern of one, then two, then three, then four etc. consecutive odd numbers, starting each time at 3.


1



3, 3, 5, 3, 5, 7, 3, 5, 7, 9, 3, 5, 7, 9, 11, 3, 5, 7, 9, 11, 13, 3, 5, 7, 9, 11, 13, 15, 3, 5, 7, 9, 11, 13, 15, 17, 3, 5, 7, 9, 11, 13, 15, 17, 19, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 3, 5, 7, 9, 11, 13, 15, 17, 19
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

Obtained from A158405 by deleting the 1's, or from A141620 by deleting the positive numbers and flipping all signs.


LINKS

Table of n, a(n) for n=1..75.


FORMULA

a(A000124(i))=3, i>=0.  R. J. Mathar, Apr 04 2009


MATHEMATICA

sp[n_]:=Module[{cl=Range[3, 51, 2], l={}}, Table[l=Join[l, Take[cl, i]], {i, n}]; l ]; sp[15] (* Harvey P. Dale, Oct 30 2011 *)


PROG

(PARI) forstep(m=3, 9, 2, forstep(n=3, m, 2, print1(n", "))) \\ Charles R Greathouse IV, Oct 30 2011


CROSSREFS

Sequence in context: A267518 A101772 A233793 * A131919 A185154 A204022
Adjacent sequences: A158891 A158892 A158893 * A158895 A158896 A158897


KEYWORD

nonn,easy


AUTHOR

Paul Curtz, Mar 29 2009


EXTENSIONS

Edited by R. J. Mathar, Apr 04 2009
Corrected by Harvey P. Dale, Oct 30 2011


STATUS

approved



