OFFSET
0,3
COMMENTS
Also number of ways to partition the multiset consisting of n copies each of 1, 2, ..., n into n multisets of size n.
EXAMPLE
a(3) = 10: (2*3*5)^3 = 2700 = 30*30*30 = 45*30*20 = 50*27*20 = 50*30*18 = 50*45*12 = 75*20*18 = 75*30*12 = 75*45*8 = 125*18*12 = 125*27*8.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Apr 21 2020
EXTENSIONS
More terms from Andrew Howroyd, Apr 21 2020
STATUS
approved