A166453 - OEIS

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A166453 as a triangular array

											1
										2		1
									2		0		1
								4		2		2		1
							2		0		0		0		1
						4		2		0		0		2		1
					4		0		2		0		2		0		1
				8		4		4		2		4		2		2		1
			2		0		0		0		0		0		0		0		1
		4		2		0		0		0		0		0		0		2		1
	4		0		2		0		0		0		0		0		2		0		1

A166453 as a square array

1	2	2	4	2	4	4	8	2	4	4
1	0	2	0	2	0	4	0	2	0
1	2	0	0	2	4	0	0	2
1	0	0	0	2	0	0	0
1	2	2	4	0	0	0
1	0	2	0	0	0
1	2	0	0	0
1	0	0	0
1	2	2
1	0
1

A166453 as an upper right triangle

1	2	2	4	2	4	4	8	2	4	4
	1	0	2	0	2	0	4	0	2	0
		1	2	0	0	2	4	0	0	2
			1	0	0	0	2	0	0	0
				1	2	2	4	0	0	0
					1	0	2	0	0	0
						1	2	0	0	0
							1	0	0	0
								1	2	2
									1	0
										1