Number of equilateral triangles with coordinates (w,x,y,z) in the set {0, 1,...,n}.
A226558
Number of equilateral triangles with coordinates (w,x,y,z) in the set {0, 1,...,n}.
Terms
- a(0) =64a(1) =1984a(2) =23232a(3) =153824a(4) =724352a(5) =2661504a(6) =8208640a(7) =22114304a(8) =53570368a(9) =119129856a(10) =246971072a(11) =482429024a(12) =896290944a(13) =1594476160a(14) =2732250688a(15) =4529267712a(16) =7292346816a(17) =11438236320a(18) =17528382400a(19) =26300206624
External references
- oeis: A226558