Number of ways of placing n labeled balls into 3 indistinguishable boxes with at least 2 balls in each box.
15, 105, 490, 1918, 6825, 22935, 74316, 235092, 731731, 2252341, 6879678
1 seqfan posts
Fri Oct 29 05:35:16 CEST 2010 [seqfan] Implementing first 500 sequences in Java