A305214 Numbers k such that A305212(k) is not zero.
7, 9, 14, 18, 21, 27, 28, 35, 36, 42, 45, 49, 54, 56, 63, 70, 72, 77, 81, 84, 90, 91, 98, 99, 105, 108, 112, 117, 119, 126, 133, 135, 140, 144, 147, 153, 154, 161, 162, 168, 171, 175, 180, 182, 189, 196, 198, 203, 207, 210, 216, 217, 224, 225, 231, 234, 238
Offset: 1
Keywords
Programs
-
PARI
isok(n) = my(v=[]); for (x=1, n, for (y=1, n, v = concat(v, Mod(x, n)^3 + Mod(y, n)^3))); n != #Set(v); \\ Michel Marcus, Jul 10 2018
-
Python
[n for n in range(100) if n != len(set((pow(x,3,n) + pow(y,3,n))%n for x in range(n) for y in range(n)))]
Extensions
a(25)-a(57) from Jon E. Schoenfield, May 28 2018
Comments