A168021 - OEIS

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A168021 as a triangular array

												1
											2		1
										3		0		1
									5		2		0		1
								7		0		0		0		1
							11		3		2		0		0		1
						15		0		0		0		0		0		1
					22		5		0		2		0		0		0		1
				30		0		3		0		0		0		0		0		1
			42		7		0		0		2		0		0		0		0		1
		56		0		0		0		0		0		0		0		0		0		1
	77		11		5		3		0		2		0		0		0		0		0		1

A168021 as a square array

1	2	3	5	7	11	15	22	30	42	56	77
1	0	2	0	3	0	5	0	7	0	11
1	0	0	2	0	0	3	0	0	5
1	0	0	0	2	0	0	0	3
1	0	0	0	0	2	0	0
1	0	0	0	0	0	2
1	0	0	0	0	0
1	0	0	0	0
1	0	0	0
1	0	0
1	0
1

A168021 as an upper right triangle

1	2	3	5	7	11	15	22	30	42	56	77
	1	0	2	0	3	0	5	0	7	0	11
		1	0	0	2	0	0	3	0	0	5
			1	0	0	0	2	0	0	0	3
				1	0	0	0	0	2	0	0
					1	0	0	0	0	0	2
						1	0	0	0	0	0
							1	0	0	0	0
								1	0	0	0
									1	0	0
										1	0
											1