A333037 Table read by rows: T(n,k) = number of k-sided polygons in an equal-armed cross with arms of length n (see Comments in A331456 for definition) for k = 3,4,5,6,7.
4, 0, 0, 0, 0, 84, 20, 0, 0, 0, 380, 180, 0, 8, 0, 1076, 764, 40, 20, 0, 2380, 2316, 64, 48, 0, 4716, 5188, 224, 52, 0, 8236, 10492, 360, 92, 0, 13620, 18772, 632, 108, 0, 21188, 31380, 864, 196, 0, 31596, 49228, 1376, 224, 8, 44980, 74268, 1920, 272, 8
Offset: 0
Examples
Table begins: 4, 0, 0, 0, 0 84, 20, 0, 0, 0 380, 180, 0, 8, 0 1076, 764, 40, 20, 0 2380, 2316, 64, 48, 0 4716, 5188, 224, 52, 0 8236, 10492, 360, 92, 0 13620, 18772, 632, 108, 0 21188, 31380, 864, 196, 0 31596, 49228, 1376, 224, 8 44980, 74268, 1920, 272, 8 The row sums are A331456.
Comments