
Binary strings:
	1	2	4	8	16	32


Integer compositions:
	1	1	2	4	8	16


Permutations:
	1	1	2	6	24	120


Derangements:
	1	0	1	2	9	44


Involutions (telephone numbers):
	1	1	2	4	10	26


Ordered binary trees, counting internal nodes (Catalan numbers):
	1	1	2	5	14	42


Ordered unary-binary trees, counting all nodes:
	0	1	1	2	4	9


General ordered trees, counting all nodes (Catalan numbers shifted right):
	0	1	1	2	5	14

