A167194 - OEIS

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A167194 as a triangular array

													1
												2		1
											1		2		1
										0		1		2		1
									0		0		1		2		1
								0		0		0		1		2		1
							0		0		0		0		1		2		1
						0		0		0		0		0		1		2		1
					0		0		0		0		0		0		1		2		1
				0		0		0		0		0		0		0		1		2		1
			0		0		0		0		0		0		0		0		1		2		1
		0		0		0		0		0		0		0		0		0		1		2		1
	0		0		0		0		0		0		0		0		0		0		1		2		1

A167194 as a square array

1	2	1	0	0	0	0	0	0	0	0	0	0
1	2	1	0	0	0	0	0	0	0	0	0
1	2	1	0	0	0	0	0	0	0	0
1	2	1	0	0	0	0	0	0	0
1	2	1	0	0	0	0	0	0
1	2	1	0	0	0	0	0
1	2	1	0	0	0	0
1	2	1	0	0	0
1	2	1	0	0
1	2	1	0
1	2	1
1	2
1

A167194 as an upper right triangle

1	2	1	0	0	0	0	0	0	0	0	0	0
	1	2	1	0	0	0	0	0	0	0	0	0
		1	2	1	0	0	0	0	0	0	0	0
			1	2	1	0	0	0	0	0	0	0
				1	2	1	0	0	0	0	0	0
					1	2	1	0	0	0	0	0
						1	2	1	0	0	0	0
							1	2	1	0	0	0
								1	2	1	0	0
									1	2	1	0
										1	2	1
											1	2
												1