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Triangle read by rows: row n lists quartic remainders modulo n.
1

%I #6 Oct 19 2017 03:14:33

%S 0,1,0,1,0,1,0,1,0,1,3,4,0,1,2,4,0,1,0,1,4,7,0,1,5,6,0,1,3,4,5,9,0,1,

%T 4,9,0,1,3,9,0,1,2,4,7,8,9,11,0,1,6,10,0,1,0,1,4,13,16,0,1,4,7,9,10,

%U 13,16,0,1,4,5,6,7,9,11,16,17,0,1,5,16,0,1,4,7,9,15,16,18,0,1,3,4,5,9,11,12

%N Triangle read by rows: row n lists quartic remainders modulo n.

%o (PARI) maybefourth(n) = { for(x=2,n, b=floor(x-1); a=vector(b+1); for(y=1,b, z=y^4%x; if(z<>0, a[y]=z; ) ); s=vecsort(a); c=1; print1(s[1]","); for(j=2,b+1, if(s[j]<>s[j-1], c++; print1(s[j]",") ) );

%Y Cf. A096110.

%K nonn,tabf

%O 2,11

%A _Cino Hilliard_, Jul 21 2004

%E Edited by _Don Reble_, May 07 2006