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%I #9 Aug 03 2014 14:01:25
%S 8,8,8,8,8,12,8,12,8,12,12,8,12,8,12,18,8,12,18,8,12,20,8,18,20,8,18,
%T 20,8,12,18,20,8,18,20,24,8,12,18,20,24,12,18,20,24,27,8,12,18,27,8,
%U 12,18,20,27,28,12,24,27,8,12,18,20,24,27,28,8,18,20,24,28,32,12,20,24,27,28
%N Irregular triangle read by rows: square-full quadratic non-residues.
%C The irregular triangle of numbers is:
%C ..n....Square-full quadratic non-residues
%C ..1....
%C ..2....
%C ..3....
%C ..4....
%C ..5....
%C ..6....
%C ..7....
%C ..8....
%C ..9.....8
%C .10.....8
%C .11.....8
%C .12.....8
%C .13.....8
%C .14....12
%C .15.....8.12
%C .16.....8.12
%C .17....12
%C .18.....8.12
%C .19.....8.12.18
%C .20.....8.12.18
%C .21.....8.12.20
%C .22.....8.18
%C .23....20
%C .24.....8.18.20
%C .25.....8.12.18.20
%C .26.....8.18.20.24
%C .27.....8.12.18.20.24
%C .28....12.18.20.24.27
%C .29.....8.12.18.27
%C .30.....8.12.18.20.27.28
%C .31....12.24.27
%C .32.....8.12.18.20.24.27.28
%C .33.....8.18.20.24.28.32
%C .34....12.20.24.27.28
%H C. H. Gribble, <a href="/A165925/b165925.txt">Flattened irregular triangle read by rows j = 9 to 200</a>
%t Flatten[Table[Select[Complement[Range[n - 1], Mod[Range[n/2]^2, n]], ! SquareFreeQ[#] &], {n, 9, 34}]] (* _T. D. Noe_, Nov 22 2011 *)
%Y Cf. A096013.
%K nonn,tabf
%O 9,1
%A _Christopher Hunt Gribble_, Sep 30 2009