A158894 Sawtooth pattern of one, then two, then three, then four etc. consecutive odd numbers, starting each time at 3.

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

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 * A352445 A131919 A185154

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