A321434
Sequences linked to this entry ?
-
A321434: Triangle read by rows; T(n,k) is the number of achiral rows of n colors using exactly k colors.
identification, match triangle
1 · 0, 1 · 0, 1 · 0, 1, 2 … Σ 1, 1, 1, 3, 3, 13, 13, 75, …