A156319 - OEIS

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A156319 as a triangular array

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

A156319 as a square array

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

A156319 as an upper right triangle

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