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%I #11 Nov 21 2013 12:49:35
%S 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,
%T 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,
%U 9,11,13,15,17,19,21,23,3,5,7,9,11,13,15,17,19
%N Sawtooth pattern of one, then two, then three, then four etc. consecutive odd numbers, starting each time at 3.
%C Obtained from A158405 by deleting the 1's, or from A141620 by deleting the positive numbers and flipping all signs.
%F a(A000124(i))=3, i>=0. - _R. J. Mathar_, Apr 04 2009
%t 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 *)
%o (PARI) forstep(m=3,9,2,forstep(n=3,m,2,print1(n", "))) \\ _Charles R Greathouse IV_, Oct 30 2011
%K nonn,easy
%O 1,1
%A _Paul Curtz_, Mar 29 2009
%E Edited by _R. J. Mathar_, Apr 04 2009
%E Corrected by Harvey P. Dale, Oct 30 2011
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