Diagonal having the first Gaussian integer with n distinct prime factors in the triangle S000404.
0, 2, 4, 10, 30, 90, 330, 1530, 6630, 33150
1
T. D. Noe, Plot of 10 terms
Eric W. Weinstein, MathWorld: Gaussian Integers
(Mma) Total /@ Partition[{0, 0, 2, 0, 3, 1, 10, 0, 30, 0, 75, 15, 315, 15, 1275, 255, 6630, 0, 29835, 3315}, 2]
Cf. S000407.
nonn,more
T. D. Noe, Dec 12 2014