A226558 Number of equilateral triangles with coordinates (w,x,y,z) in the set {0, 1,...,n}.

64, 1984, 23232, 153824, 724352, 2661504, 8208640, 22114304, 53570368, 119129856, 246971072, 482429024, 896290944, 1594476160, 2732250688, 4529267712, 7292346816, 11438236320, 17528382400, 26300206624

Offset: 1

Author

Ray Chandler, Jun 10 2013

Keywords

• nonn

Links

• Ray Chandler, Table of n, a(n) for n = 1..100
• Eugen J. Ionascu, Equilateral triangles in Z^4, arXiv:1209.0147 [math.NT].

Crossrefs

Cf. A102698.