A226920 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A226920 as a triangular array

											1
										1		0
									1		0		1
								1		0		1		1
							1		0		1		1		1
						1		0		1		2		2		1
					1		0		1		2		4		2		2
				1		0		1		2		4		6		5		1
			1		0		1		2		5		8		13		4		2
		1		0		1		2		5		10		20		19		8		2
	1		0		1		2		5		10		28		36		36		9		2

A226920 as a square array

1	1	1	1	1	1	1	1	1	1	1
0	0	0	0	0	0	0	0	0	0
1	1	1	1	1	1	1	1	1
1	1	2	2	2	2	2	2
1	2	4	4	5	5	5
1	2	6	8	10	10
2	5	13	20	28
1	4	19	36
2	8	36
2	9
2

A226920 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1
	0	0	0	0	0	0	0	0	0	0
		1	1	1	1	1	1	1	1	1
			1	1	2	2	2	2	2	2
				1	2	4	4	5	5	5
					1	2	6	8	10	10
						2	5	13	20	28
							1	4	19	36
								2	8	36
									2	9
										2