A171608 - OEIS

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A171608 as a triangular array

													1
												2		0
											0		2		0
										0		3		0		0
									0		0		3		0		0
								0		0		4		0		0		0
							0		0		0		4		0		0		0
						0		0		0		5		0		0		0		0
					0		0		0		0		5		0		0		0		0
				0		0		0		0		6		0		0		0		0		0
			0		0		0		0		0		6		0		0		0		0		0
		0		0		0		0		0		7		0		0		0		0		0		0
	0		0		0		0		0		0		7		0		0		0		0		0		0

A171608 as a square array

1	2	0	0	0	0	0	0	0	0	0	0	0
0	2	3	0	0	0	0	0	0	0	0	0
0	0	3	4	0	0	0	0	0	0	0
0	0	0	4	5	0	0	0	0	0
0	0	0	0	5	6	0	0	0
0	0	0	0	0	6	7	0
0	0	0	0	0	0	7
0	0	0	0	0	0
0	0	0	0	0
0	0	0	0
0	0	0
0	0
0

A171608 as an upper right triangle

1	2	0	0	0	0	0	0	0	0	0	0	0
	0	2	3	0	0	0	0	0	0	0	0	0
		0	0	3	4	0	0	0	0	0	0	0
			0	0	0	4	5	0	0	0	0	0
				0	0	0	0	5	6	0	0	0
					0	0	0	0	0	6	7	0
						0	0	0	0	0	0	7
							0	0	0	0	0	0
								0	0	0	0	0
									0	0	0	0
										0	0	0
											0	0
												0